Spring 2023: How It Happened

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

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!

How to… Identify UK Butterfly Species

A flash of colour flitting by in the heat of the summer sun. Twisting this way and that, showing off amazing aerial acrobatics above a meadow of long, waving grass. A butterfly, small but standing out against a backdrop of browns, yellows, reds, blues and whites. Floating like a leaf down to a flower, the butterfly stops, flicking its wings before coming to a stop, wings outstretched in the sunshine. What could this beauty be?

Butterflies come in all shapes, sizes and colours, and can be found in a variety of habitats, from big cities to more remote areas. They are also a popular cultural symbol across the globe, with symbolism ranging from rebirth and transformation to representing the human soul. Along with their long history of capturing the mind and imagination of people, in nature, butterflies are great indicators of the health of habitats and are an important part of the food chain. As is the common story right now, butterflies are unfortunately threatened by habitat loss and degradation, as well as climate change, pesticide use, and invasive species. They need our help!

To be able to help butterflies, we need to understand them better. In the UK, we have 59 species, with only 2 being migrants. Though butterflies are more noticeable for people to identify, most Brits can only name but a handful of species. As we ease into summer, now is a great time to brush up your knowledge of what species you can identify. Here’s 13 to get you started!

Butterflies

Brimstone (Gonepteryx rhamni)

  • Family: White and Yellow butterflies
  • Size: Large (60-74mm wide)
  • Butterfly appearance: Look like veined-leaves with pale-yellow undersides and an orange dot on each wing. Uppersides: Males= sulphurous yellow; Female= paler in colour
  • Caterpillar food plants: Buckthorn and Alder Buckthorn
  • On the wing: Can be seen throughout the year, but most commonly during spring
  • Winter: Hibernate as adults in wooded areas
  • Distribution: Common in England and Wales, less common in Ireland, and very rare in Scotland

Small Tortoiseshell (Aglais urticae)

  • Family: Brush-footed butterflies
  • Size: Medium (45-60mm wide)
  • Butterfly appearance: Bright orange wings with a black pattern, white patch close to each outer top edge, and a border of blue half-moons. Underside dark and light brown
  • Caterpillar food plants: Nettles
  • On the wing: March-October
  • Winter: Hibernate as adults in sites, such as tree hollows and sheds
  • Distribution: Widespread throughout Britain

Red Admiral (Vanessa atalanta)

  • Family: Brush-footed butterflies
  • Size: Large (64-78mm wide)
  • Butterfly appearance: Black wings with red bands and white markings. Underside is similar, but paler and more mottled
  • Caterpillar food plants: Nettles
  • On the wing: March-October
  • Winter: Hibernate as adults
  • Distribution: Widespread throughout Britain

Painted Lady (Vanessa cardui)

  • Family: Brush-footed butterflies
  • Size: Medium/Large (58-74mm)
  • Butterfly appearance: Orange wings with black and white markings. Underside is similar, but paler and more mottled
  • Caterpillar food plants: Thistles and sometimes nettles and mallows
  • On the wing: March-October
  • Winter: Migrate from Africa each spring
  • Distribution: Widespread across Britain

Gatekeeper (Pyronia tithonus)

  • Family: Brush-footed (brown) butterflies
  • Size: Medium (37-48mm wide)
  • Butterfly appearance: Orange and brown wings on top with a black false eye on each wing. Males are smaller and richer in colour than females, with distinct dark band across the forewing. Underside of the forewing is largely orange and the hindwing yellow and brown
  • Caterpillar food plants: Fine grasses, such as fescues
  • On the wing: June-September
  • Winter: Hibernate as caterpillars
  • Distribution: Most common in southern and central England and Wales

Marbled White (Melanargia galathea)

  • Family: Brush-footed (brown) butterflies
  • Size: Medium (53-58mm wide)
  • Butterfly appearance: Distinctive black and white chequered wings that vary in pattern between individuals. Undersidesnot so brightly marked with eye-spots and grey or yellowish bands
  • Caterpillar food plants: Grasses, such as red fescue and sheep’s-fescue
  • On the wing: June-August
  • Winter: Hibernate as caterpillars
  • Distribution: Southern and central England and Wales

Ringlet (Aphantopus hyperantus)

  • Family: Brush-footed (brown) butterflies
  • Size: Medium (42-52mm wide)
  • Butterfly appearance: Begin velvety with deep blackish brown wings bordered by white. Iconic rings on wings vary in number, size and shape. Females larger with more pronounced markings
  • Caterpillar food plants: Various grasses including cock’s-foot and tufted hair-grass
  • On the wing: June-August
  • Winter: Hibernate as caterpillars
  • Distribution: Everywhere apart from northern Scotland

Speckled Wood (Pararge aegeria)

  • Family: Brush-footed (brown) butterflies
  • Size: Medium (46-56mm wide)
  • Butterfly appearance: Dark brown with cream spots, though the female’s are larger. Forewings have a false eye and hindwings have three false eyes. Undersides mottled brown
  • Caterpillar food plants: Various grasses including false brome, cock’s-foot, Yorkshire fog, and common couch
  • On the wing: March-October
  • Winter: Hibernate as caterpillars or a chrysalis
  • Distribution: Throughout England (except the far north), Wales and Ireland, and in northern Scotland

Meadow Brown (Maniola jurtina)

  • Family: Brush-footed (brown) butterflies
  • Size: Medium (40-60mm wide)
  • Butterfly appearance: Male= dark brown with dark scent patch on forewing and faint orange smudge; Female= lighter brown with more orange on wings. Underside is largely orange with mottled brown hindwing
  • Caterpillar food plants: Wide range of grasses from fine fescues to coarse cock’s-foot
  • On the wing: May-September
  • Winter: Hibernate as caterpillars
  • Distribution: Widespread across Britain

Comma (Polygonia c-album)

  • Family: Brush-footed butterflies
  • Size: Medium/Large (50-64mm)
  • Butterfly appearance: Orange wings with brown patterns and scalloped edges to wings. Mottled underside with white, comma-like mark on hindwing
  • Caterpillar food plants: Nettle, elm and hop
  • On the wing: Spring after hibernation; Summer brood= June-July; Autumn brood= August-September
  • Winter: Hibernate as adults, camouflaged as a leaf
  • Distribution: Widespread across England and Wales, rare in southern Scotland and Northern Ireland

Peacock (Aglais io)

  • Family: Brush-footed butterflies
  • Size: Large (63-75mm wide)
  • Butterfly appearance: Red wings with four large false eyes. Undersides almost black
  • Caterpillar food plants: Nettles
  • On the wing: Spring after hibernation, and June-September
  • Winter: Hibernate as adults in hollow trees and buildings
  • Distribution: Widespread across Britain

Small Skipper (Thymelicus sylvestris)

  • Family: Skippers
  • Size: Small (25-34mm wide)
  • Butterfly appearance: Orange on top with a black edge, and paler undersides. Male= dark stripe in centre of fore-wing. Antenna tip is orange below
  • Caterpillar food plants: Yorkshire fog and other tall grasses
  • On the wing: June-September
  • Winter: Hibernate as caterpillars
  • Distribution: Widespread up to North Yorkshire and Scottish border

Large Skipper (Ochlodes venatus)

  • Family: Skippers
  • Size: Small (28-36mm wide)
  • Butterfly appearance: Wings rich brown with orange patches, but male has a dark bar in the centre of the forewing. Underside mottled orange
  • Caterpillar food plants: Cock’s-foot and other tall grasses
  • On the wing: May-September
  • Winter: Hibernate as caterpillars
  • Distribution: Throughout England, Wales, and in Dumfries and Galloway