Will Langdon

@wlangdon12.bsky.social

Assistant Conservation Officer for Epping Forest. PhD on the effects of nitrogen pollution on insects, particularly likes butterflies and moths.

Marsh Fritillaries Euphydryas aurinia starting to fly at some of the Dartmoor, Devon sites over the weekend. One was caught by a carnivorous Sundew but plenty survived to start the next generation of these rare and beautiful butterflies.

Earlier this week, I visited Poldice Mine for the annual survey of Cornwall Butterfly Conservation's experimental management plots. Created back in January 2024, it's fascinating to see how each plot is developing... 🧵

A quadrat placed in one of the (scraped) management plots at Poldice Mine. The habitat consists of pioneer-stage heathland, with young Heather plants and fine-leaved grasses recolonising the bare ground.

One of the first things that struck me starting in Epping Forest last spring was all the lovely old Crab Apples. With these, come rare Crab Apple feeding micros: the much-declined Argyresthia ivella tapped from a tree on a warm July morning, and Eudemis porphyrana, reared from larva in May #TeamMoth

The micro moth Argyresthia ivellaThe micro moth Eudemis porphyranaA larva of the micro moth Eudemis porphyranaAn old Crab Apple tree in Epping Forest

The sort of butterfly moment you dream of today - wandering around the office (Epping Forest) in the late afternoon sun when I flushed a lovely old Large Tortoiseshell from the sunny wall next to this old plum - just wonderful. Seems to be the second recent record from the forest #Butterflies

BildBildBild

Recently finished totting up my moths in Epping Forest last year - 671 species of which 277 were new for our database, 79 nationally scarce, and 4 new for Essex. Wonderful first year, so many exciting and rare species reflecting the forest's fantastic mix of habitats. Some highlights below...

The whacky larval case of Coleophora saturatella (Broom Case-Bearer) made from fragments of Broom leaves. This species was found at both Wanstead and Leyton Flats in good numbers. The last south Essex records were also from Wanstead in the 1970s.The micro moth Crambus uliginosellus (Marsh Grass-veneer) found by day in a bog in the north of Epping Forest. This was the first Essex record of this species which feeds on sedges and grasses growing through Sphagnum moss, confirming the importance of our small areas of Sphagnum bog.The whacky thumb-print like mines of Leucoptera lotella (Trefoil Blister Moth) on Greater Bird's Foot Trefoil (Lotus pedunculatus). This is a rare species in spite of its rather common foodplants. It proved reasonably common in damp grasslands in the forest. This was the second Essex record.An adult of the mysterious tineid moth Stenoptinea cyanimarmorella (Cyan Marbled). This species is rather poorly known, but comes to the HYL lure (for Raspberry Clearwing) as this one did in late summer.

An exciting Epping Forest micro from last week - a couple of Dichrorampha sylvicolana flushed from their Sneezewort foodplant in one of our damp grasslands. Last found in the forest, Essex and (seemingly) SE England by Maitland Emmet in the 70s, it's great to know it's still here.

BildBildBild

Dystebenna stephensi was right at the top of my Epping Forest moth bucket list when I started working here, and so very pleased to have found lots of them on oak trunks in the last couple of weeks - rare, beautiful, and associated with fabulous old oaks. What's not to like! #TeamMoth

The micro moth Dystebenna stephensi on an oak trunkThe micro moth Dystebenna stephensi on an oak trunkTwo adults of Dystebenna stephensi on an oak trunk, circled in red.Habitat of Dystebenna stephensi with old oaks, 10 individuals were found on the trunks of the two nearest oaks.

Do you know a young person with an interest in insects? 🦋 The Douglas Boyes Fund aims to provide people aged 14-18 with access to entomology equipment, fostering their passion for insects and inspiring them to engage and share their interest with other young individuals 🔽

Douglas Boyes Fund - Royal Entomological Society

The Douglas Boyes Fund has been established in honour of Douglas Boyes (1996-2021), an esteemed entomologist specialising in Lepidoptera. The Fund aims to provide young people aged 14-18 with access…

buff.ly

Some work news - into my third month as the new(ish!) Assistant Conservation Officer in Epping Forest. Really excited to be working in such a fantastic, ancient mosaic of habitats, and enjoyed the first couple of months - mostly out in the field in beautiful spring weather, what's not to like...

BildBildBildBild

So great to see Nick Bowles from Upper Thames BC recognised here - such a passionate, modest and determined guy who has done so much for butterflies and moths in the Upper Thames.

Butterfly Conservation@savebutterflies.bsky.social · last yr.

The results are in! We’re thrilled to announce the winners of the #VolunteerAwards2025 🏆🎉 These incredible individuals have gone above and beyond to make a difference for butterflies and moths. Meet this year's winners 👉 butterfly-conservation.org/news-and-blo... #VolunteersWeek

A grid of six photos featuring Butterfly Conservation's Volunteer Awards 2025 winners

One of the lesser appreciated things about Cambridge (UK) is what a green and generally nature friendly city it is. I don't mean the largely biodiversity poor manicured green of the university Colleges (though some like King's are making some effort). I mean the network of Commons and LNRs 🧵

'meadow' King's College, Cambridge