Silver Birch

Spring 2024: How It Happened

/ Laura Tuke / 1 Comment

Over the last few years, it has been noticeable that weather patterns and average temperatures have been changing and highly unpredictable, leading to the seasons, such as spring, varying from month-to-month and year-to-year, especially here in Dorset. For example, last year spring began a wash out, moving to cold and stormy spells, before ending with heat waves. This year was an equally odd series of spring weather events with a cold start to the season, followed by wet weather with northerly winds, and finishing with drier spells. It was on average warmer and wetter, but cold nights continued for a long time, and had a noticeable effect on plant growth patterns being seen.

Spring 2023 encountered trends for later spring events and a slow start to spring, which helped to create a mismatch between species and spring events. With a warmer, wetter winter before spring this year, and often above average spring temperatures, it is likely the trends this year may differ to those of 2023. It will be interesting to see if this has had an effect though, by looking at trends for some tree, shrub, flower, insect and bird species. How will spring 2024 have shaped up? Read on to see how my favourite season unfurled this year!

Trees

During 2023, spring emergence dates for trees showed a trend for on average later dates, ranging from 1 to 28 days later. In 2024 though, the majority of spring tree dates were earlier, as seen with field maple, horse chestnut, english oak, and wild cherry, ranging from 1 to 22 days earlier from March through to May. Alder dates though were fractionally later, as were ash and sycamore flowering, and silver birch and norway maple budburst, but the other events for these species occurred earlier. The on average warmer and wetter weather will most likely be the reason for these trends, allowing trees to get a head start this year.

Flowers

Plants flowering during spring 2023 occurred on average later, varying from 1 to 16 days. During spring 2024 though, flowering has occurred earlier, as was the trend with tree species. For snowdrops, lesser celandines, primroses, greater stitchwort, wood anemones, early purple orchids, wild garlic, yellow archangel, cuckooflowers, oxeye daisies, and bluebells flowering occurred 1 to 32 days earlier between January and May. The exceptions were found with daffodils, flowering 6 days later during February, and cowslips, 4 days later during April. It would be understandable thus to think that the warmer, wetter weather of the start of spring will have had a heavy influence on these events, just like with trees.

Insects

Of 12 species that had the emergence date recorded during spring 2023, the majority emerged later than the year before, ranging from 2 to 46 days later. This year though, spring 2024 saw the occurrence of a 50:50 split for the 10 species that had their emergence date recorded, with some species from 2023 yet to be seen at all, such as painted lady butterflies.

Buff-tailed bumblebees, 7-spotted ladybirds, and orange tip, red admiral, and speckled wood butterflies all emerged earlier this year, ranging from 2 to 46 days earlier. Conversely, queen wasps, and brimstone, peacock, gatekeeper, and small tortoiseshell butterflies all emerged later than 2023, ranging from 8 to 47 days later. Though not complete for all, the split does tend to be due to March to April species emerging earlier this year whereas April to June species emerged later this year. This may be due to April being a cooler, wetter month this year, impacting insect species more greatly than plant species that were already making their advance and were less impacted.

Shrubs

Spring 2023 mainly showed a trend for later shrub budburst, leaf unfurling and flowering, ranging from 3-27 days from March to May. In contrast, for spring 2024, the majority of events for shrubs occurred earlier, ranging from 1 to 53 days earlier from December through to May. These included for blackthorn, dog rose, elder, hawthorn and hazel, with the only later event being for red female hazel flowers being observed. This trend shows similarities to those of trees and spring flowering plants, and would be similarly due to a warmer, wetter winter and start of spring, allowing events to occur earlier and shrubs to get a head start on the season.

Birds

Following on from the last two years (2022 and 2023), the dates of bird events during spring 2024 showed no clear trend, with a split between different species and events. Rooks began building their nests earlier, chiffchaffs and swallows arrived earlier, song thrushes and yellowhammers first sang earlier, and the first wrens fledged earlier. Conversely, blackbirds first sang later, the first blackbirds fledged later, blackcaps, cuckoos and house martins arrived later, and great-spotted woodpeckers drummed later.

Some of these event timing changes will be due to spring temperatures and weather conditions on short term and long term scales. Other reasons are less obvious currently, but the hope is that bird events will still have been timed right with other species to make the most of resources this year.

Conclusion

Spring 2024 was a thoroughly odd season, varying from month-to-month, but feeling like wet weather prevailed more than the normal. In the end it was vibrant and colourful, though missing the traditional spring feeling. This year spring was heavily effected by climatic changes and changes to weather patterns, and this may become typical during the springs to come. It is really hard to predict then how each season will play out, and it will be interesting to see now how all British species cope with such unpredictability as time goes on. Only time will tell!

Species List

  • Alder (Tree) Alnus glutinosa
  • Ash (Tree) Fraxinus excelsior
  • Blackbird (Bird) Turdus merula
  • Blackcap (Bird) Sylvia atricapilla
  • Blackthorn (Shrub) Prunus spinosa
  • Bluebell (Flowering Plant) Hyacinthoides non-scripta
  • Brimstone butterfly (Insect) Gonepteryx rhamni
  • Buff-tailed bumblebee (Insect) Bombus terrestris
  • Chiffchaff (Bird) Phylloscopus collybita
  • Common wasp (Insect) Vespula vulgaris
  • Cowslip (Flowering Plant) Primula veris
  • Cuckoo (Bird) Cuculus canorus
  • Cuckooflower (Flowering Plant) Cardamine pratensis
  • Daffodil (Flowering Plant) Narcissus spp.
  • Dog rose (Shrub) Rosa canina
  • Early purple orchid (Flowering Plant) Orchis mascula
  • Elder (Shrub) Sambucus nigra
  • English oak (Tree) Quercus robur
  • Field maple (Tree) Acer campestre
  • Gatekeeper butterfly (Insect) Pyronia tithonus
  • Greater stitchwort (Flowering Plant) Stellaria holostea
  • Great-spotted woodpecker (Bird) Dendrocopos major
  • Hawthorn (Shrub) Crataegus monogyna
  • Hazel (Shrub) Crataegus monogyna
  • Horse chestnut (Tree) Aesculus hippocastanum
  • House martin (Bird) Delichon urbicum
  • Lesser celandine (Flowering Plant) Ficaria verna
  • Norway maple (Tree) Acer platanoides
  • Orange-tip butterfly (Insect) Anthocharis cardamines
  • Oxeye daisy (Flowering Plant) Leucanthemum vulgare
  • Peacock butterfly (Insect) Aglais io
  • Primrose (Flowering Plant) Primula vulgaris
  • Red admiral butterfly (Insect) Vanessa atalanta
  • Rook (Bird) Corvus frugilegus
  • Seven-spot ladybird (Insect) Coccinella septempunctata)
  • Silver birch (Tree) Betula pendula
  • Small tortoiseshell butterfly (Insect) Aglais urticae
  • Snowdrop (Flowering Plant) Galanthus spp.
  • Song thrush (Bird) Turdus philomelos
  • Speckled wood butterfly (Insect) Pararge aegeria
  • Swallow (Bird) Hirundo rustica
  • Sycamore (Tree) Acer pseudoplatanus
  • Wild cherry (Tree) Prunus avium
  • Wild garlic (Flowering Plant) Allium ursinum
  • Wood anemone (Flowering Plant) Anemone nemorosa
  • Wren (Bird) Troglodytes troglodytes
  • Yellow archangel (Flowering Plant) Lamium galeobdolon
  • Yellowhammer (Bird) Emberiza citrinella

Spring 2023: How It Happened

/ Laura Tuke / Leave a comment

The last few years spring has been unusual and unpredictable, with the effects of climate change changing from month-to-month, year-to-year in Dorset. This year has fitted into this with months switching back and forth between record breaking dry spells or heat waves to rainfall or low temperatures. This is bound to have had an effect on nature and the wildlife around us, which is interesting to explore.

Last year there were trends towards earlier spring events or a slow start to spring and then a speeding up to events in April. I can already suggest that spring this year was slow to start as it gave me the opportunity to really experience spring as it got under way and unfolded in front of me. It will be interesting to see though, if this was the trend for trees, shrubs, flowers, insects and birds alike, if the trend differs to 2022 and how spring shaped up as a whole. Read on to see how my favourite season went this year in all its vibrancy!

Trees

Though in 2022 spring emergence dates for trees had crept earlier than the year before, in 2023 nearly all tree dates were later than 2022, following a more similar trend to 2021 and the proceeding years. Field maple and silver birch both flowered earlier in April, but otherwise ash, horse chestnut, english oak, wild cherry and Norway maple all budburst, unfurled leaves and flowered between 1 and 28 days later from March through to May. The same could be said for the leaves of field maple and silver birch. It was odd to see trees though, lacking their fineries for so long this year!

Flowers

In 2022, flowering times varied between species, but this could be split into half flowering earlier and half later than the year before. This year primroses, cuckooflowers and bluebells in woodland all flowered earlier (4, 2 and 1 day earlier respectively), but flowering trends generally followed a more similar pattern to to those of tree events, occurring later. For snowdrops, lesser celandines, daffodils, stitchwort, cowslips, wood anemones, early purple orchids, wild garlic, oxeye daisies, and hedgerow bluebells this was 1-16 days later between January and June. Interestingly yellow archangel was noticeably absent during its usual flowering time, and instead flowered 36 days later than in 2022 on 17th May, being greatly affected by climate and a great indicator of spring conditions.

Insects

Of 13 species recorded emerging during spring 2022, only 2 did not emerge earlier than the year before: the buff-tailed bumblebee and orange-tip butterfly. For 2023, spring flipped dates back around for insect emergences, with 10 out of 12 recorded species emerging later than the year before. This ranged from 2 days later with the speckled wood butterfly to 46 days later with the red admiral butterfly. The exceptions were peacock and comma butterflies, being recorded 15 and 36 days earlier respectively. This could be due to the colder spring impacting and delaying emergences, for example the brimstone butterfly, a common sign of spring, delayed its emergence until the 3rd of April 2023.

Shrubs

For shrub species recorded in 2022, spring events occurred both earlier and later than in 2021, with no obvious trends. In comparison, spring 2023 showed an obvious trend, with nearly all recorded budburst, first leaf unfurling and flowering for 6 species, occurring later than 2022. The exceptions were dog rose flowering earlier in May and hazel catkins flowering earlier in January. The other spring events took place 3-27 days later from February to May. It was an odd year to see blackthorn flowering 2 weeks later within March and meeting its peak in April, and hawthorn first flowering in May, later than usual.

Birds

There was a split with spring bird events in 2022, with events closer to the start of the season occurring later, and those towards the second half occurring earlier than 2021. For 2023, it seems that the dates of spring bird events were also split, but this time with less clear a trend. Rooks began building nests later and most birds fledged young later, but swallows arrived on the 11th April once again, and blackbirds began singing earlier in February. Some differences in event occurrence can be explained by spring temperatures and weather conditions, whereas some are less easily explained for 2023. It is expected though that the later spring will have an overall effect on bird species through other spring events occurring later.

Conclusion

Spring 2023 varied from month-to-month with weather, temperatures, natural events and vibrancy. As a whole, a general unsettled and cooler time led to spring events occurring later than the year before for many species. The concern is though, that there may be a mismatch between the occurrence of events for different species, such as trees and birds, which could have had a greater impact than currently known. Time will tell what the impact of spring 2023 may be!

Species List

  • Ash (Tree) Fraxinus excelsior
  • Blackbird (Bird) Turdus merula
  • Blackcap (Bird) Sylvia atricapilla
  • Blackthorn (Shrub) Prunus spinosa
  • Bluebell (Flowering Plant) Hyacinthoides non-scripta
  • Brimstone butterfly (Insect) Gonepteryx rhamni
  • Buff-tailed bumblebee (Insect) Bombus terrestris
  • Chiffchaff (Bird) Phylloscopus collybita
  • Comma butterfly (Insect) Polygonia c-album
  • Cowslip (Flowering Plant) Primula veris
  • Cuckoo (Bird) Cuculus canorus
  • Cuckooflower (Flowering Plant) Cardamine pratensis
  • Daffodil (Flowering Plant) Narcissus spp.
  • Dog rose (Shrub) Rosa canina
  • Early purple orchid (Flowering Plant) Orchis mascula
  • Elder (Shrub) Sambucus nigra
  • English oak (Tree) Quercus robur
  • Field maple (Tree) Acer campestre
  • Goldfinch (Bird) Carduelis carduelis
  • Greater stitchwort (Flowering Plant) Stellaria holostea
  • Great-spotted woodpecker (Bird) Dendrocopos major
  • Hawthorn (Shrub) Crataegus monogyna
  • Hazel (Shrub) Crataegus monogyna
  • Horse chestnut (Tree) Aesculus hippocastanum
  • House martin (Bird) Delichon urbicum
  • House sparrow (Bird) Passer domesticus
  • Lesser celandine (Flowering Plant) Ficaria verna
  • Meadow brown butterfly (Insect) Maniola jurtina
  • Norway maple (Tree) Acer platanoides
  • Orange-tip butterfly (Insect) Anthocharis cardamines
  • Oxeye daisy (Flowering Plant) Leucanthemum vulgare
  • Painted lady butterfly (Insect) Vanessa cardui
  • Peacock butterfly (Insect) Aglais io
  • Primrose (Flowering Plant) Primula vulgaris
  • Red admiral butterfly (Insect) Vanessa atalanta
  • Red-tailed bumblebee (Insect) Bombus lapidarius
  • Rook (Bird) Corvus frugilegus
  • Seven-spot ladybird (Insect) Coccinella septempunctata)
  • Silver birch (Tree) Betula pendula
  • Small tortoiseshell butterfly (Insect) Aglais urticae
  • Snowdrop (Flowering Plant) Galanthus spp.
  • Song thrush (Bird) Turdus philomelos
  • Speckled wood butterfly (Insect) Pararge aegeria
  • Starling (Bird) Sturnus vulgaris
  • Swallow (Bird) Hirundo rustica
  • Swift (Bird) Apus apus
  • Wild cherry (Tree) Prunus avium
  • Wild garlic (Flowering Plant) Allium ursinum
  • Wood anemone (Flowering Plant) Anemone nemorosa
  • Wren (Bird) Troglodytes troglodytes
  • Yellow archangel (Flowering Plant) Lamium galeobdolon
  • Yellowhammer (Bird) Emberiza citrinella

Spring 2022: How It Happened

/ Laura Tuke / 1 Comment

This year spring has been a blast of colour, abundance, and new beginnings. Though April experienced some cooler weather, and storms blew up here and there, on the whole spring was calm and dry. What characterised this spring most of all though was the weather being warmer in general, making spring 2022 the 5th warmest on average with a quarter less rainfall. Turbulent winter weather led to a slower start to spring, but the increasing warmer days led to spring speeding up and going out in a hurry in my home area of Dorset.

Last year weather patterns had a big influence on spring events, with events moving earlier or later as a result. For many species, events actually occurred later in spring in Dorset in 2021 due to cooler and wetter weather overall. For example, compared to 2020, oak leaves unfurled 31 days later, bluebells flowered 4 days later, and swallows arrived 5 days later. It was an unsual spring that was still joyful, but showed the unexpected impact that climate change is already having on spring events.

After the unpredictability of spring 2021, it will be interesting to see how spring events have fared this year in 2022. How is spring looking as a season overall in 2022? Did specific spring events get back on track or continue to become later? And did spring events continue to follow weather patterns? Read on to find out!

Trees

This year on my family’s farm we have seen a general trend for tree budburst, first leaf and first flowering occurring earlier than in 2021, showing dates more similar to those of 2020 or ones that were even earlier. This was true for beech (Fagus sylvatica), field maple (Acer campestre), horse chestnut (Aesculus hippocastanum), english oak (Quercus robur), wild cherry (Prunus avium), and Norway maple (Acer platanoides) trees, all between 9 and 28 days earlier. This was similar for ash (Fraxinus excelsior) and silver birch (Betula pendula) trees, but ash showed budburst 10 days later and silver birch first leaves 4 days later.

For first flowers, horse chestnut and ash trees shared the earlier trend with them blooming 2 and 34 days earlier respectively. For field maple, english oak, silver birch, wild cherry, and Norway maple flowers though, flowers actually appeared anywhere between 1 to 24 days later.

Shrubs

For blackthorn (Prunus spinosa), dog rose (Rosa canina), elder (Sambucus nigra), hawthorn (Crataegus monogyna), lilac (Syringa vulgaris), and hazel (Crataegus monogyna) first flowering occurred earlier than in 2021. This ranged from hazel flowers 5 days earlier to blackthorn flowers 21 days earlier.

Surprisingly for first budburst and first leaf, the opposite trend was actually shown. For blackthorn, dog rose, elder, hawthorn, and lilac these spring events were seen to occur on the same day as 2021 or later by 2-13 days. As these shrub events occur more towards the start of spring, maybe the slow start to spring was having an effect. Hazel budburst occurred 12 days earlier instead, but first leaf was delayed and ended up fitting the trend, unfurling 13 days later on 24th March.

Flowers

Though snowdrops (Galanthus spp.) first showed their snowy heads 12 days earlier on 6th January, first flowering was 6 days later for daffodils (Narcissus spp.) on 25th January, 11 days later for lesser celandines (Ficaria verna) on 26th January, and 45 days later for primroses (Primula vulgaris) on 14th February.

Other spring flowering species had a more mixed response to the season, either appearing earlier or later compared to 2021, as we moved from March to April. The earlier appearers were:

  • Bluebell (Hyacinthoides non-scripta) – 6 days earlier on 26th March
  • Early purple orchid (Orchis mascula) – 11 days earlier on 7th April
  • Yellow archangel (Lamium galeobdolon) – 22 days earlier on 11th April
  • Wild garlic (Allium ursinum) – 1 day earlier on 19th April
  • Oxeye daisy (Leucanthemum vulgare) – 16 days earlier on 18th May

The later appearers were:

  • Wood anemone (Anemone nemorosa) – 2 days later on 1st April
  • Greater stitchwort (Stellaria holostea) – 3 days later on 4th April
  • Cuckooflower (Cardamine pratensis) – 2 days later on 10th April
  • Cowslips (Primula veris) – 9 days later on 11th April

Grasses

This year all recorded grass species flowered earlier. Meadow foxtail (Alopecurus pratensis) first flowered 18 days earlier on 22nd April, Yorkshire fog (Holcus lanatus) 33 days earlier on 10th May, and cocksfoot (Dactylis glomerata) 21 days earlier on 19th May.

Birds

With birds, the first spring events of the year occurred later on average. For example, song thrushes (Turdus philomelos) were first heard singing 18 days later on 19th January, rooks (Corvus frugilegus) were first seen building their nests 2 days later on 27th February, and blackbirds (Turdus merula) were first heard singing 6 days later on 16th February.

As we reached March, events occurred earlier than in 2021, with chiffchaffs Phylloscopus collybita) arriving 3 days earlier on 13th March, cuckoos (Cuculus canorus), blackcaps (Sylvia atricapilla), and yellowhammers (Emberiza citrinella) first singing 3, 7 and 14 days earlier respecitvely in April, and great-spotted woodpeckers (Dendrocopos major) first fledging 10 days earlier on 6th June. Swallows (Hirundo rustica) were an exception though first returning to our land 1 day later on 11th April.

Insects

The majority of insects I recorded were first seen on the wing on our land earlier than in 2021, making the most of our more stable weather, These were:

  • Red-tailed bumblebee (Bombus lapidarius) – 27 days earlier on 3rd March
  • 7-spot ladybird (Coccinella septempunctata) – 1 day earlier on 19th March
  • Peacock butterfly (Aglais io) – 10 days earlier on 20th March
  • Small tortoiseshell butterfly (Aglais urticae) – 16 days earlier on 22nd March
  • Brimstone butterfly (Gonepteryx rhamni) – 26 days earlier on 23rd March
  • Red admiral butterfly (Vanessa atalanta) – 14 days earlier on 24th March
  • Speckled wood butterfly (Pararge aegeria) – 53 days earlier on 21st April
  • Small white butterfly (Pieris rapae) – 14 days earlier on 8th May
  • Painted lady butterfly (Vanessa cardui) – 43 days earlier on 17th May
  • Meadow brown butterfly (Maniola jurtina) – 27 days earlier on 22nd May
  • Comma butterfly (Polygonia c-album) – 31 days earlier on 17th June

The exceptions were the buff-tailed bumblebee (Bombus terrestris) that emerged 19 days later on 18th March and orange-tip butterfly (Anthocharis cardamines) first seen 18 days later on 18th April.

Summary

This year during spring, plants tended to flower earlier, which could be due to the on average less turbulent weather, alongside the possibility of stress responses being triggered by the increasing temperatures at times. As a result flowers appeared earlier and went over more quickly.

Budburst and leaves did not follow as consistent a trend, but on average plants went through these spring events later than 2021. This may be due to many of these events occurring more towards the beginning of spring, when day length and temperature increases would have only just started to take an effect. Bird events followed spring in general with a slow start and a quick finish, whilst insects emerged earlier, as expected after last year’s unpredictable weather.

This year I have enjoyed all that spring had to offer, though it felt like once it got started it rushed through to its finish. In the moment it was a glorious season, but was cut short in its splendour. Being my favourite season, this year I was particularly sad when the season went over in to summer. Let’s see what will happen during the seasons to come and enjoy the adventures to be had!

Spring 2021: How It Happened

/ Laura Tuke / Leave a comment

This spring has been an unexpected, unpredictable and turbulent season, that has taken its time to unfurl. Traditionally spring is a season that is characterised as calm and dry, with days getting longer and warmer, and the potential for cooler nights. As lighter evenings returned this year though, spring was far from traditional, with a stormy then hot March, cold and frosty April, and a wash out of a May.

Since 2017, I have recorded the dates of the events of spring every year, and with the start of my blog, every year since I have analysed and compared spring events to see how the season took form. Last year I showed that the timing of spring events is heavily linked to spring weather, resulting in either earlier or later occurrence accordingly. Over the last couple of years this has varied alot, so it will be interesting to see what has gone on this year.

This spring a lot has been going on for me, but I have still found time to be out in nature as much as possible and to enjoy the time when one season slips into another. It has felt that spring has dragged on longer this year, with the potential effects of spring starting warm and progressing to cold, then wet. So as this spring comes to a gradual close and the heat sets in, it is time to find out what actually went on during spring 2021.

Trees

This year there was a general trend for trees being later in their bud burst, leaves unfurling, and flowering compared to 2020. Even before the frosty nights of April, silver birch (Betula pendula) buds burst 14 days later on 26th March, Norway maple (Acer platanoides) first flowered 5 days later on 26th March, and beech (Fagus sylvatica) buds burst 14 days later on 27th March.

As we moved through April and into May, spring events began to stretch even further in their lateness. For example, wild cherry (Prunus avium) buds burst 35 days later on 8th April, horse chestnut (Aesculus hippocastanum) first flowered 18 days later on 20th April, alder (Alnus glutinosa) buds burst 15 days later on 21st April, the first lime (Tilia x europaea) leaves unfurled 23 days later on 26th April, pedunculate/english oak (Quercus robur) leaves first unfurled 31 days later on 5th May, and ash (Fraxinus excelsior) flowered 37 days later on 9th May.

Field maple (Acer campestre) did not follow this trend though, with bud burst being 10 days earlier on 26th March, and first leaves unfurling 5 days earlier on 1st April. This may be as these trees missed the worst of the spring weather, but for the other trees spring events ranged from being 1 to 37 days late!

Shrubs

For a lot of the shrub species I monitored a similar trend was shown as with tree species, being later compared to 2020. For example, elder (Sambucus nigra) leaves first unfurled 34 days later on 18th March, blackthorn (Prunus spinosa) first flowered 17 days later on 23rd March, and hawthorn (Crataegus monogyna) first flowered 23 days later on 11th May.

Though half of the shrubs I monitored were later in their spring events, ranging anywhere from 2-34 days later, two species did not completely fit this trend. For lilac (Syringa vulgaris) bud burst occurred 12 days earlier on 24th February, but flowered 17 days later on 2nd May. This was the same for dog rose (Rosa canina), where buds burst 12 days earlier on 22nd February, but first flowered 22 days later on 8th June. For both of these species though, it is the spring events occurring before April that are earlier, as the ones occurring in April and May were not immune to the frosts and heavy rainfall like the other shrubs.

Flowers

For many of our commonly associated spring flower species, there was a little more of a split between appearing earlier or later, but on average they flowered later compared to 2020. Snowdrops (Galanthus spp.) first flowered 15 days later on 18th January, wood anemones (Anemone nemorosa) 8 days later on 30th March, bluebells (Hyacinthoides non-scripta) and greater stitchwort (Stellaria holostea) both 4 days later on 1st April, cowslips (Primula veris) 12 days later on 2nd April, early purple orchid (Orchis mascula) 12 days later on 18th April, wild garlic (Allium ursinum) 14 days later on 20th April, and oxeye daisy (Leucanthemum vulgare) 16 days later on 3rd June.

The exceptions were a section of earlier flowering species, including primrose (Primula vulgaris) first flowering 27 days earlier on 31st December, lesser celandine (Ficaria verna) 3 days earlier on 15th January, daffodil (Narcissus spp.) 22 days earlier on 19th January, and cuckooflower (Cardamine pratensis) 10 days earlier on 8th April. These flowers would have been influenced by a warmer winter and start to spring, generally flowering before the cold spell in April.

Birds

On average, bird species spring events have also become later this year compared to 2020. I heard my first song thrush (Turdus philomelos) singing 17 days later on 1st January, I saw my first rook (Corvus frugilegus) nests being built 10 days later on 25th February, and I heard my first chiffchaff (Phylloscopus collybita) on 16th March. April and May events were again influenced, for example I saw my first swallow (Hirundo rustica) 5 days later on 10th April, saw my first house martin (Delichon urbicum) 9 days later on 21st April, heard my first cuckoo (Cuculus canorus) 3 days later on 1st May, and saw my first swift (Apus apus) 10 days later on 16th May.

There were two exceptions though, where I recorded hearing my first blackbird (Turdus merula) singing 13 days earlier on 10th February, and saw my first blackcap (Sylvia atricapilla) 8 days earlier on 14th April. These would most likely relate to other influencing factors, such as overwintering in the UK or habitat requirements.

Insects

Compared to previous years, I have still yet to see some species of butterfly that would typically be on the wing by now, such as gatekeeper butterflies (Pyronia tithonus). For the insects I have seen though, again there was a split in event occurrence compared to 2020. For example, I saw my first small tortoiseshell butterfly (Aglais urticae) 2 days later on 7th April, red admiral butterfly (Vanessa atalanta) 26 days later on 7th April, brimstone butterfly (Gonepteryx rhamni) 26 days later on 18th April, and speckled wood butterfly (Pararge aegeria) 52 days later on 13th June.

The early emergers came in the form of my first buff-tailed bumblebee (Bombus terrestris) 14 days earlier on 27th February, peacock butterfly (Aglais io) 5 days earlier on 30th March, orange-tip butterfly (Anthocharis cardamines) 13 days earlier on 31st March, and red-tailed bumblebee (Bombus lapidarius) 12 days earlier on 19th April. Despite these species appearing earlier in spring, later flowering plants will have had a knock-on effect for them due to a mismatch in timing for food. Only further down the line will we be able to see the extent of this impact.

Summary

This year I have recorded more spring dates than I have done so before, such as alder trees flowering, first yellowhammer singing, and first green-veined white butterfly, which will be useful information during the years to come. This reflects how I have felt more in touch with nature this year even with the unusual weather patterns, such as alot of rain! It became clear as we went through May though, that there was a trend for events happening later and later. This is why I was so interested to see how far this trend actually extended amongst species.

Last year I wrote that spring events are ‘in fact getting later, which will be related to… weather and environmental factors here and further afield’. This year this has turned out to be the case, which shows how climate change is having more of an impact through changes in weather patterns rather than just warmer temperatures. Earlier spring events have been getting earlier with warmer winters, but heavy rainfall and colder starts to spring have been affecting late March to May events most. I wonder now what impact this might have as we move forward, for example greater mismatches in ecological timings.

How to… Identify British Tree Species

/ Laura Tuke / 1 Comment

A majestic oak standing tall in the landscape, watching as centuries pass it by. A silver birch with drooping branches, embellished with leaves, slowly blowing in the breeze. An alder leaning over the edge of a river, spreading its branches to shade the bank beneath it. From capturing the imaginations of children to symbolising strength and life for adults, trees in all their forms are an important part of the landscape and culture within Britain.

With over 70 species in the UK alone, trees come in all shapes and sizes, and can be found anywhere from our highlands to our cities. Trees colonised Britain following the last glaciation, and have since become intertwined with our very own history. They provide us with so much, including resources, such as medicines and building materials, improved air quality, homes for wildlife, and even cultural services, such as therapy through forest bathing. Thus, they are a very important part of our environment!

Now, as our reliance on trees grows and the threats to them increase, it is surprising how little people know about trees in general. For example, the average Brit is unable to name more than five tree species, and a third even believe a money tree is a real species! With two thirds of the public now wanting to learn a little more about the trees in their area, here’s my handy guide to help you identify 10 common tree species that can be found in the UK.

Tree Species

1. Pedunculate or English Oak (Quercus robur)

  • Family: Fagaceae – related to species such as beech and sweet chestnut
  • Origin: Native
  • Shape and size: Up to 40m tall, upward-reaching and broad crown
  • Stems and twigs: Massive rugged grey-brown trunk
  • Leaves: 10-12cm long, oblong, and lobed, turning brown in autumn
  • Flowers: On the same tree and flowering April-June. Male flowers= yellow-green catkins; female flowers= pinkish and on short stalks
  • Seeds: Produces the familiar acorn, with scaly cups and clusters carried on long stalks
  • Range & habitat: Widespread and common throughout Britain, found in habitats ranging from deciduous and mixed woodlands to open grassland and hedgerows

In Winter: Look for rounded buds that have overlapping scales and are found in clusters at the end of each shoot

2. Sessile oak (Quercus petraea)

  • Differs to Pedunculate Oak in that the leaves taper to an unlobed base and have long stalks.
  • Buds in winter have more scales (more than 20).
  • Also, the clustered acorns are almost stalk-less with downy cups.
  • Narrower in shape, prefers more acid soils, and is more common in the West of Britain.

3. Common Ash (Fraxinus excelsior)

  • Family: Oleaceae – related to olive trees and lilac
  • Origin: Native
  • Shape and size: Tall and domed with widely spaced branches, growing up to 35m
  • Stems and twigs: Bark is pale brown to grey, becoming rugged with age
  • Leaves: Opposite and toothed, with 9-13 stalked leaflets that have long tips
  • Flowers: Male and female flowers typically grow on different trees, but both have purple flowers growing in clusters before the leaves
  • Seeds: Single seeds with a long wing (known as keys)
  • Range & habitat: Woods and hedges, in particular flourishing on a lime-rich/well-drained soil

In Winter: Smooth twigs with distinctive hairless black buds, and ridged bark on adult trees that resembles a diamond pattern

4. Horse Chestnut (Aesculus hippocastanum)

  • Family: Sapindaceae – related to lychee and maples
  • Origin: Non-native (introduced in the 1500s from the Balkan peninsula in southeastern Europe)
  • Shape and size: Arching branches, usually turned up at the ends, growing up to 35m tall
  • Stems and twigs: Bark is scaly and red-brown or dark grey-brown
  • Leaves: Five to seven large, thick, stalkless leaflets with pronounced veins and a long, tapering base
  • Flowers: Showy spike (candle) of white flowers with a yellow to pink spot
  • Seeds: Spiny fruit contains one or more shiny conkers
  • Range & habitat: It has now become a widespread and common sight across Britain, tolerating a wide range of soils

In Winter: Smooth bark and sticky buds

5. Common Alder (Alnus glutinosa)

  • Family: Betulaceae – related to hazel and birches
  • Origin: Native
  • Shape and size: Regular branching and conical shape, growing up to 25m
  • Stems and twigs: Dark brown bark that is often rough and sprouts young shoots
  • Leaves: Alternate, rounded, sometimes notched at the tip, and dark green
  • Flowers: Male and female catkins grow on the same tree, before the leaves. Male catkins= lambs’ tails; female catkins= small and egg-shaped
  • Seeds: Female catkins turn into a small cone, drying from green to brown, releasing the seeds. The seeds have corky outgrowths that keep them afloat on water
  • Range & habitat: Thrives in wet ground and is often seen lining the banks of rivers and streams across Britain

In Winter: Appears dull purplish due to purplish buds

6. Silver Birch (Betula pendula)

  • Family: Betulaceae – related to alders, hazels and hornbeams
  • Origin: Native
  • Shape and size: Erect with pointed crown and drooping branches, reaching up to 30m
  • Stems and twigs: Young bark reddish, maturing to black and papery-white bark. Twigs smooth with small dark bumps
  • Leaves: Alternate, triangular and shiny, on slender stalks. Edges are ragged, with smaller teeth between larger main teeth
  • Flowers: Male catkins= purply-brown; female catkins= smaller and pale green
  • Seeds: Two winged and wind-borne, released in winter
  • Range & habitat: Form natural woodlands on light, dry soils throughout Britain

In Winter: Distinctive shape and bark

7. Sycamore (Acer pseudoplatanus)

  • Family: Sapindaceae – related to maples and horse chestnut
  • Origin: Non-native (introduced from Europe either in the 1500s or by the Romans)
  • Shape and size: Massive domed outline, with dense foliage and heavy lower branches, growing up to 35m
  • Stems and twigs: Grey fissured bark ages to pinkish-brown
  • Leaves: Opposite, five-lobed, and upper side dark green
  • Flowers: Greeny-yellow flowers in hanging clusters appear with the leaves
  • Seeds: Hairless keys in right-angled pairs
  • Range & habitat: Grow vigorously in all parts of Britain, being widely planted on their own for shelter or in woodlands and hedgerows

In Winter: Distinctive shape and bark

8. Wild Cherry (Prunus avium)

  • Family: Rosaceae – related to roses
  • Origin: Native
  • Shape and size: Pyramidal shape, reaching up to 30m
  • Stems and twigs: Shiny, red-brown bark peels in horizontal strips
  • Leaves: Alternate and oval with long points and regular, forward-pointing teeth, and two conspicuous red glands at the top of the stalk
  • Flowers: White flowers (blossom) appear before the leaves in small, loose clusters
  • Seeds: Produces round, red cherries
  • Range & habitat: Native throughout the UK, being found in woodlands and hedgerows

In Winter: Distinctive bark

9. Common Hazel (Corylus avellana)

  • Family: Betulaceae – related to birches, alders and hornbeams
  • Origin: Native
  • Shape and size: Many stems rise from the ‘stool’, which if left uncut can reach 9m
  • Stems and twigs: Bark coppery brown, smooth and tending to peel
  • Leaves: Alternate, almost circular with sawtooth edges, hairy, and soft to the touch
  • Flowers: Male and female flowers found on the same tree. Male= lemon-yellow lambstail catkins; Female= tiny buds with red tassels
  • Seeds: An edible nut encased in a thick-green husk, ripening in autumn
  • Range & habitat: Grows throughout Britain, often found in woods, scrub areas, and hedges

In Winter: Distinctive shape and bark, accompanied by the male catkins from December

10. Field Maple (Acer campestre)

  • Family: Sapindaceae – related to lychee and horse chestnut
  • Origin: Native
  • Shape and size: Round-shaped tree with branches that droop at the end, growing up to 26m
  • Stems and twigs: Bark is grey or light brown and twigs downy, later corky
  • Leaves: Emerging leaves have a pinkish tinge, turning dull-green, and are opposite and small, with three main, round-tipped lobes and two smaller basal lobes
  • Flowers: Small yellow-green flowers form erect clusters
  • Seeds: Each pair of seed wings lie in an almost straight line, are often tinged with pink
  • Range & habitat: Frequent in England and East Wales in woods and hedgerows

In Winter: Sinuous trunk and distinctive shape

Drawings and photos all my own

Spring 2020: How It Happened

/ Laura Tuke / Leave a comment

Walking through the trees, in dappled early morning sunlight, through swathes of brilliant blue. Standing rooted to the spot, hearing the first Chiffchaff, Swallow, Cuckoo. Sitting in breezy sunshine, learning to identify Hawkbits, Vetches and Viper’s-Bugloss. These are just some of the highlights of my spring this year, wild and full of life. With each new day, there was a new wild highlight to be had.

13_05_20_Farm_Sunrise_Hangings_Gate

Following on from my post last week about my favourite photos from this spring (check out Spring 2020: In Photos), I wanted to continue celebrating the lifeline that has been spring and the natural world for me during lockdown. This week I am looking at how spring unfolded this year in my local area and how it looked now the summer is hitting our shores.

Since 2015 I have been writing down a lot of my observations about spring each year. This means I can now look at spring 2020 in light of how the last few years have actually looked and see if anything interesting comes up. Last year I did this in more detail, so for that check out my post called: How Spring Happened 2017-2019.

22_06_19_Farm_Chalk_Mound_Oxeye_Daisies_6

So, did a favourite of my mum’s, the Chiffchaff, return by Mother’s Day this year? Did the Oak burst into leaf before the Ash (and so are we in for a splash)? And did the song of the Cuckoo return to my family’s land for another year? As spring now slips into summer, it is time for me to reflect on an extra special spring.

Trees

One of the very first trees to start showing signs of life each spring at my home in Dorset, is the Horse Chestnut (Aesculus hippocastanum). This year the first buds burst on the 18th of February, which shows a gradual shift forwards over the last few years, being 6 days earlier than last year, and a month earlier than 2018. The first leaf then unfurled on the 10th of March (9 days later than 2019), followed by the first flowers on the 2nd of April (13 days earlier than 2019).

Due to a cold start to spring and a very wet winter, which left the ground cold and waterlogged, Pedunculate (English) Oaks (Quercus robur) were late to make a start, with the first budburst seen on the 2nd of April, 37 days later than 2019. They got going quickly though, with leaves bursting forth by the 8th of April (4 days earlier than 2019) and flowers blooming by the 12th of April (13 days earlier than 2019).

Despite the ground, the trend this year was towards earlier budburst, first leaves and first flowers. Silver Birch (Betula pendula) buds burst on the 15th March, 15 days earlier than 2019; Ash (Fraxinus excelsior) flowered on the 2nd of April, 18 days earlier than 2019; Field Maple (Acer campestre) buds burst on the 5th of April, 13 days earlier than 2019. Grey Willow (Salix cinerea) bucked the trend though, first flowering on the 24th of February, later than last year by 10 days.

This year I added Alder (Alnus glutinosa), Beech (Fagus sylvatica), Lime (Tilia x europaea), Wild Cherry (Prunus avium), and Norway Maple (Acer platanoides) to my spring records, but I did not make observations for Sycamore as in previous years. Lime buds burst on the 14th of March, followed by the first leaf on the 3rd of April; Wild Cherry buds burst on the 15th of March, followed by the first leaf 1 month later and first flower 15 days after that; Norway Maple first flowered on the 21st of March; Alder buds burst on the 6th of April; and Beech buds burst on the 10th of April.

Shrubs

Hazel (Corylus avellana) is one species that flowers early in the year, providing a first hint of colour in a wintry landscape. This year I first saw the male catkins on the 8th of January, followed by the female red flowers on the 1st of February (5 days later than 2019). The first hazel leaf then unfurled 43 days later on the 14th of March.

Blackthorn (Prunus spinosa) is another species that flowers before it produces its leaves, cloaking hedgerows in drifts of snowy white and accompanying a ‘blackthorn winter’ in early spring. This year the first flowers burst open on the 6th of March, 5 days later than last year, but 24 days earlier than 2018.

After the early flowering species have brought colour to our countryside, Hawthorn (Crataegus monogyna) is one of the first shrubs to burst into leaf in the hedgerows. This year its buds first burst on the 2nd of March, 5 days later than 2019, followed by the first leaf unfurling 10 days after (28 days earlier than 2019). Their flowers then followed a month after, on the 18th of April, 10 days earlier than 2019.

07_05_20_Farm_Hawthorn_Flowers_3

A similar trend was shown with Lilac (Syringa vulgaris), where budburst took place on the 8th of March, 13 days later than 2019. The first leaf then unfurled 3 days later too, on the 25th of March, and the first flowers bloomed on the 15th of April, 7 days earlier than 2019.

The flowers of Elder (Sambucus nigra) are well known and iconic in our countryside, popular for making elderflower cordial. This year Elder flowered early, with the first flowers being seen at home on the 25th of April (22 days earlier than 2019). Just like Elder, the Dog Rose (Rosa canina) is another late bloomer, which opened its petals for the first time on the 17th of May this year (11 days earlier than last year).

Flowers 

The very first flowers to be seen blooming in the countryside is the dainty snow white Snowdrop (Galanthus spp.). Over the last few years the drooping heads of snowdrops have been flowering earlier each year. This year though, it appeared only 1 day earlier than 2019, welcoming in the year on the 3rd of January.

Snowdrops were soon followed by other iconic spring species, in the form of the first Lesser Celandine (Ficaria verna) on the 18th of January (44 days earlier than 2019), the first Primrose (Primula vulgaris) on the 27th of January (8 days earlier than 2019), and the first Daffodils (Narcissus spp.); on the 2nd of February (the same day as last year!).

As spring went on, the Snowdrops and sunshine yellows were joined by Wood Anemones (Anemone nemorosa) on the 22nd of March, Bluebells (Hyacinthoides non-scripta) on the 28th of March, Wild Garlic (Allium ursinum) on the 6th of April, Cuckooflowers (Cardamine pratensis) on the 18th of April, and Oxeye Daisies (Leucanthemum vulgare) on the 18th of May, all occurring 6-17 days earlier than last year.

This year I also included three new flowering species to my spring records: Cowslips (Primula veris), Greater Stitchwort (Stellaria holostea), and Early Purple Orchids (Orchis mascula). I saw the first Cowslip flower on the 20th of March, the first Greater Stitchwort on the 28th of March, and the first Early Purple Orchid on the 6th of April.

Grasses

This year I was so busy in May and the first half of June that I completely overlooked the flowering of 3 common perennial grass species in my local area: Cock’s-foot (Dactylis glomerata), Timothy (Phleum pratense), and Yorkshire Fog (Holcus lanatus). I did though catch Meadow Foxtail (Alopecurus pratensis) flowering, which first occurred on the 22nd of April (23 days earlier than 2019).

13_05_20_Sunrise_Meadow

Birds

With the start of every new year, I begin to keep my eye out for the start of the Rooks (Corvus frugilegus) nesting in the bare and skeletal forms of large oak trees near my home. This year they kept me waiting awhile though, with the first signs of nest building appearing on the 15th of February, 17 days later than 2019.

Unlike the start of the Rooks nesting though, the start of male Song Thrushes (Turdus philomelos) singing crept even earlier than last spring. This was 13 days earlier in fact, with me hearing my first on the 15th of December in 2019! This was not reflected by Blackbirds (Turdus merula) though, as I heard my first male singing on the 23rd of February, 17 days later than 2019.

One of my favourite first signs that spring has begun has to be the return of the Chiffchaff (Phylloscopus collybita). This year they returned to my home in Dorset on the 1st of March, 17 days earlier than 2019.

15_04_20_Farm_Bird_Chiffchaff

The glorious return of the Chiffchaffs were then eagerly followed by the first Swallow (Hirundo rustica) on the 5th of April (1 day later than 2019), the first House Martin (Delichon urbicum) on the 12th of April (12 days earlier than 2019), the first Blackcap (Sylvia atricapilla) on the 22nd of April (11 days later than 2018), and the first Swift (Apus apus) on the 6th of May (19 days earlier than 2018). A Cuckoo (Cuculus canorus) did make its exciting return to my family’s land too, which I heard for the first time on the 28th of April (24 days earlier than last year).

25_06_20_Farm_Birds_Swallow_Chicks

Insects 

This year the majority of the insects I observed, emerged later than they did last year in 2019. I saw my first Brimstone Butterfly (Gonepteryx rhamni) on the 24th of March, my first Peacock Butterfly (Aglais io) on the 4th of April, my first Small Tortoiseshell Butterfly (Aglais urticae) on the 5th of April, my first Orange-Tip Butterfly (Anthocharis cardamines) on the 13th of April, my first Red-Tailed Bumblebee (Bombus lapidarius) on the 1st of May, and my first queen Wasp (Vespula vulgaris) on the 7th of May, with all ranging anywhere between 4 and 37 days later in date than last year.

The ones that did not follow this pattern though, were the Speckled Wood Butterfly (Pararge aegeria) first seen on the same day as last year on the 22nd of April, and the Red Admiral Butterfly (Vanessa atalanta) that was first seen 29 days earlier on the 22nd of April. This year I also added Buff-Tailed Bumblebee (Bombus terrestris) to my observations, seeing the first at home on the 13th of March.

25_05_19_Horseshoe_Wood_Speckled_Wood_Butterfly_7

This Year

This year it has definitely been an interesting and joyful experience to watch how spring unfolded. It started with early signs during the winter, before arriving with a blaze of glory in March.

13_05_20_Sunrise_Oak_Tree_Grass_3

This last winter was a warm, wet and windy one, which left the ground cold and waterlogged for quite a while into spring. A number of species such as Oak trees struggled with this, but for many it did not stop them from emerging on time or earlier, such as snowdrops and field maples. This variation continued with bird species, some arriving and beginning breeding earlier and some later. For a lot of the insect species though, they emerged late, which will have had a lot to do with the less than ideal weather conditions this spring, for example frosts in April. Thus, how spring is changing year-to-year definitely has a lot to do with changing weather conditions.

So as spring fades to summer heat, I can now say that the Chiffchaff made its return to the British Isles by Mother’s Day, the Oak burst into leaf before the Ash (and so we are in for a splash!), and a Cuckoo made its return to my home. It has definitely been a great spring this year!

How spring happened 2017-2019

/ Laura Tuke / Leave a comment

Over the last few years, I have taken part in recording how spring has unfurled at my home in Dorset, for a citizen science scheme. As at the end of each spring I upload my results to an online site, in 2017 I decided that I should be writing my observations down for myself in my wildlife journal, making it easy to look back on them in the future.

Now I have recorded dates for many different wildlife spring events, from trees coming into leaf to the return of migrants, for 2017, 2018, and 2019. So here, I want to take a moment to look back at these and reflect on what they may show about spring and its current emergence, and if there is anything interesting we can take from this.

10_05_19_Horseshoe_Woods_Cassie_Bluebells_11

Trees

In my local area, you can find a large variety of native and non-native tree species. Over the last 3 years, I have consistently made observations for 5 tree species: ash, sycamore, horse chestnut, pedunculate oak and silver birch.

25_05_19_Outside

For the 5 tree species, some similar patterns can be observed from my recorded spring dates for the last 3 years. In 2018, a colder winter was experienced, with heavy snowfalls taking place in January, February and March. Evidently this had an effect on the timing of budburst, first leaf and first flowering for tree species, in comparison to the year before.

Budburst was 36 days later for ash trees (27/04/18), 10 days later for sycamore trees (08/04/18), 19 days later for horse chestnut trees (20/03/18), 21 days later for oak trees (18/04/18), and 26 days later for silver birch trees (12/04/18). The same amount of lateness was also seen with the first leaf and first flowering for these tree species in 2018.

19_04_19_Farm_Oak_Tree_2

Due to the weather of spring 2018, this meant that when looking at how this year’s spring unfurled (2019) in comparison to last year, predictably budburst, first leaf and first flowering took place 4-53 days earlier than 2018. When comparing 2019 with 2017 though, I am able to get an idea of the average trend for the three years. For example, ash and silver birch events are getting later, as are horse chestnut flowering and sycamore first leaf. Sycamore, horse chestnut and oak generally show a trend though of spring events getting earlier, from a couple of days to a month.

30_03_19_Farm_Horse_Chestnut_Tree_2

Shrubs

For shrubs, the selection I have been observing during spring each year are: blackthorn, dog rose, elder, hawthorn and lilac. From 2017-2019, a similar trend was predominantly observed in these species as with tree species.

In comparison to 2017, blackthorn first flowering was 14 days later in 2018 (30/03/18), elder budburst was 9 days later (13/03/18), elder first leaf was 23 days later (30/03/18) , hawthorn budburst was 33 days later (02/04/18), hawthorn first leaf was 6 days later (08/04/18), and lilac first flowering was 27 days later (07/05/18).

Then when looking at 2019, spring dates were earlier in comparison to 2018, with blackthorn budburst, first leaf and first flowering being 20, 9 and 29 days earlier, dog rose budburst, first leaf and first flowering being 22 and 29 days earlier, elder budburst, first leaf and first flowering being 9, 24 and 8 days earlier, hawthorn budburst and first flowering being 36 and 13 days earlier, and lilac first flowering being 14 days earlier.

Also, similarly to tree species, blackthorn and elder both showed that from 2017 to 2019 spring events have become earlier on average. Hawthorn and lilac showed the opposite trend though, with hawthorn first leaf and first flowering becoming later over the 3 years on average, if only by 7-13 days.

21_04_19_Garden_Lilac_Sunset

Flowers 

In comparing spring between 2017, 2018 and 2019, it is evident that for many plant species the same trends have been shown from year to year. This is not true for all though, as between bluebells, cuckooflowers, lesser celandines, oxeye daisies, snowdrops and wood anemones, flowering times varied from being later in 2018 and earlier in 2019, to being earlier overall, or being similar overall.

22_06_19_Farm_Chalk_Mound_Oxeye_Daisies_10

  • Bluebells flowered 17 days later in 2018 (13/04/18) than 2017, and then 10 days earlier in 2019 compared to 2018. From 2017 to 2019, this was 7 days later overall.

  • Cuckooflowers flowered 16 days later in 2018 (20/04/18) than 2017, and then 12 days earlier in 2019 compared to 2018. From 2017 to 2019, this was 4 days later overall.
  • Lesser celandines flowered 5 days earlier from 2017 to 2018 (24/02/18), followed by another 13 days earlier in 2019.

  • Snowdrops flowered 10 days earlier from 2017 to 2018 (10/01/18), followed by another 7 days earlier in 2019.
  • Wood anemones flowered around a similar date at the beginning of March each year.

12_04_19_Horseshoe_Wood_Anemone_7

  • Oxeye daisies flowered around a similar date at the end of May each year.

Grasses

Grass species also showed a differing trend to tree and shrub species for 2017-2019, with a united pattern of flowering later each year. When observing spring events with grasses, I observe from year to year 4 species: cocksfoot, meadow foxtail, timothy, and yorkshire fog.

22_06_19_Farm_Chalk_Mound_Yorkshire_Fog_Grass_2

Only timothy had observations made for 2017, and so in comparing with 2018, it was found to have flowered 18 days later (18/05/18). This is in line with comparisons between 2018 and 2019, where it was found that cocksfoot flowered 4 days later (30/05/19), meadow foxtail flowered 14 days later (15/05/19), timothy flowered 23 days later (10/06/19), and yorkshire fog flowered 14 days later (12/06/19).

Birds

Though I have started increasing my recordings of different bird species during spring, I only have records for 2+ years for rooks, blackcaps, chiffchaffs, house martins, song thrushes, cuckoos, and swallows.

  • Following the first snowfall of the year, rooks were first seen to be nest building 16 days earlier in 2018 (04/02/18) than 2017, but with no snow, this was 11 days later in 2019.
  • Blackcaps returned to my local area 12 days later in 2018 (11/04/18) than 2017.
  • Chiffchaffs returned 13 days later in 2018 (26/03/18) than 2017, following the last of the snow and cold weather. Consequently, in 2019 they returned 8 days earlier than 2019 (15/02/19), closer to the 2017 date.
  • House martins returned 12 days later in 2018 (25/05/18) than 2017, whilst being 31 days earlier in 2019 than 2018.
  • Male song thrushes were first heard singing in 2018 on 28/01/18, 8 days earlier than 2017. In 2019, this occurred a lot earlier though, 30 days earlier, falling on 29/12/18.
  • Male cuckoo heard calling at a similar time at the end of May in 2018 and 2019.
  • Swallows returned to my local area at a similar time at the end of March/beginning of April in 2017, 2018 and 2019.

Insects

22_06_19_Garden_Yellow_Flower_Bee

In line with tree and shrub species, the first sightings recorded each spring of insects followed a general pattern of emerging later in 2018 than 2017, and earlier in 2019 than 2018. This was true for:

  • Brimstone butterflies – 13 days later on 14th April 2018 and 47 days earlier on 26th February 2019
  • Peacock butterflies – 14 days later on 20th April 2018 and 26 days earlier on 25th March 2019
  • Small tortoiseshell butterflies – 31 days later on 26th April 2018 and 25 days earlier on 1st April 2019
  • Speckled wood butterflies – 20 days later on 26th April 2018 and 4 days earlier on 22nd April 2019
  • Orange tip butterflies – 28 days later on 4th May 2018 and 33 days earlier on 1st April 2019
  • Red admiral butterflies – 27 days earlier on 22nd April 2019 
  • 7-spot ladybirds – 19 days later on 25th April 2018
  • Queen wasps – 47 days earlier on 31st March 2019
  • Red-tailed bumblebees – 13 days earlier on 21st April 2019

25_05_19_Horseshoe_Wood_Speckled_Wood_Butterfly_3

Summary

With my love of spring, each year I have enjoyed recording the dates of when things happen during spring, such as the first swallow, first leaf or first elder flower. It has been satisfying now to be able to take a moment to put a few of my records together and take a look at how spring has unfurled over the last few years and what this could mean.

For some species, events are getting earlier, probably due to warmer temperatures earlier on in the year and during the winter before. For others, they are in fact getting later, which will be related to other weather and environmental factors here and further afield. Either way, the ‘norm’ is changing and it will be interesting to see how this could progress over the next few years to come.

19_04_19_Farm_Cows_Milk_Blackthorn_3

Winter into spring: April on the farm

/ Laura Tuke / Leave a comment

April is one of my favourite months of the year on the farm. During April, the Dorset countryside begins to burst into new life. Newborn lambs bounce in the fields, newborn calves snooze in the fields in the spring sunshine, birds begin to nest and raise a new generation, and flowers carpet the woodlands.

Plants this April still followed a trend of being late, with some woodlands not becoming decked out in their full splendour during this month like in past years. Still Bluebells, wild garlic, early purple orchids and late wood anemones began to coat the woodland floor. Also, the woodland ferns began to unfurl in the woods later than usual.

16/04/16
16/04/16
16/04/16
16/04/16
20/04/16
20/04/16

During this April, trees were very much still late, with sycamore and silver birch finally bursting into leaf. Oaks were noticeably asynchronous in their bud burst, with some trees on there way to being in full leaf and others yet to start.

18/04/16
18/04/16

April saw the main crop of migrants arriving on warm winds. This year our barn swallows returned on April 6th, exactly the same date as in 2015! By the time we were fully into April, bird breeding pairs had been firmly established, and the nesting season for many bird species was fully under way. During April, more birds can be heard singing at dawn than any other time of year, which is quite magical to hear.

This year the tawny owls are breeding later than last year, but by the end of April the first hissing calls of tawny owl fledglings could be heard resonating through Dorset woodlands.

Life could be seen blooming everywhere throughout April. Dog violets and cowslips, among other species, were seen flowering along roadside banks.

WP_20160427_002

27/04/16

Brimstone butterflies, orange tip butterflies, and peacock butterflies all began to emerge during the first half of April.

Throughout April, I made myself busy amongst the mounds university revision, by setting up my camera trap at different popular sites around our farmland. It was amazing to see the first badger cubs emerge from their den, and even more special to me, was being able to watch fox cubs beginning to explore above ground with their siblings, during the second half of the month. Fox cubs have to be my highlight of beautiful April!

10th-11th April
10th-11th April
10th-11th April
10th-11th April
10th-11th April
10th-11th April
10th-11th April

 

Badger cub! 14th-15th April
Badger cub! 14th-15th April
Badger cub being carried! 14th-15th April

Badger cub! 13th-14th April
Badger cub! 13th-14th April
Badger cub! 13th-14th April
Badger cub! 13th-14th April