Butterfly Conservation Yorkshire

@bcyorkshire.bsky.social

Surveying and Conserving Yorkshires' Butterflies and Moths

We look back at the 2026 Butterfly season with less than 20% of season remaining in terms of butterfly numbers. 11 species had their best or 2nd best summers ever with representatives from every family. Gatekeeper for the Browns but it was also very much a Vanessid, Lycaenid and Pierid summer.

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Where the Red Admiral (V atalanta) has a good year on Dutch Butterfly Monitoring transects, Peacock (dagpauwoog, A io) and Comma (gehakkelde aurelia, P c-album) are only doing so-so. The Small tortoiseshell (kleine vos, A urticae) has been down for the last ten years.

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Occupancy-trend of the Chequered Skipper (bont dikkopje, C palaemon) in NL. After a long period of gradual decline distribution in 2024 and 2025 fell by almost 50%, esp. small populations were abandoned. Helas 2026 showed little recovery as far as we can tell now.

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I must have taken 100s of photos of Purple Emperor larvae over the years, but this one, from today, is probably my favourite ... showing just how camouflaged a fully grown larva is against a leaf of its foodplant (Salix caprea, Goat Willow, in this case).

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Really valuable piece of research. We have used scrapes successfully on the old limestone quarries on Portland. A very different habitat but the vegetation recovers quickly and is also colonised by suitable ants, Lasius alienus. Sadly we do not have the resources to do enough to help SSB in big way

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Dr Marcus Rhodes@marcusrhodes.bsky.social · 3mo ago

It increasingly looks like scraping will be our preferred management treatment for future restoration of butterfly habitat on these heathland mine sites (at least where a humus layer has developed beneath the heather sward).

An excavator scraping vegetation and topsoil from an area of mature heathland at Poldice Mine.

The final zoom talk rounds up 2025 Butterfly season and what a season it was! An Annus Mirablis some would say. We look at the effects of the heat and drought on the fortunes of our species on different habitats as well as exploring a record breaking early start www.eventbrite.co.uk/e/yorkshire-...

Yorkshire Butterfly Season 2025 by Nick Hall

Nick Hall is the Yorkshire county Transect coordinator will present a review of the 2025 Butterfly Season.

eventbrite.co.uk

There are 8 species now on the wing in Yorkshire with Speckled Wood spotted along the south facing woodland roadside at Wentbridge yesterday. Emergences are running a week early and in the Midlands Holly Blue, Orange Tip and Green Hairstreak have already been spotted! Please report your sightings

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Fascinating. If this spread continues will we start to see more and more in SE England? And will any re-establishment be clouded by questions over rogue releases?

Chris van Swaay@chrisvanswaay.eurosky.social · 2y ago

Butterflies increasing in NL: Large Tortoiseshell (N polychloros, grote vos). Took me years to see my first when I started butterflying, now a regular butterfly in my area, especially in early spring. In shorturl.at/8n8Ts I argue this is most probably a result of migration from the east.

Its 2 weeks today until the start of the official Butterfly Monitoring season But for any keen beans you can do early transect walks before April 1st if the weather is warm, above 13oC, dry, bright and still. Early counts can be entered on our website as weeks -3, -2, -1, 0 etc.

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