Gerard Troost

Why is this post not on Twitter? Your have way more public over there.

European Bee-eater, a remarkable species where we are able to witness in our time an impressive northward expansion in Europe. By comparing EBBA2 data with EBBA1 (approximately 30 years prior) we can see blue squares in the N indicating that the species was found only in EBBA2 (and not in EBBA1).

Je moet het lef maar hebben. De hele wereld is slecht behalve extreem links. 😂

Iemand tips of goeie resources over welke compressie BS toepast op mp4 bestanden? Wou vandaag deze radarbeelden posten maar BS verminkt ze door extreme compressie waardoor ze heel blurry worden 🫤 Originele mp4 hier: ayco.duckdns.org/nlhrw2025041...
#dtv @jbaert.bsky.social

Thanks for sharing. Missed you in Riga!

A Wren in song perched on an umbellifer. 92% of Wrens are detected by sound, rather than visually, according to BBS surveyors (Photo: Paul Hillion/BTO)

1/ 🧵Bird songs and calls are an important way that people experience the natural world. They’re also one of the key means of surveying bird populations. In this #BOU2025 talk I will review @btobirds.bsky.social research to explore opportunities and challenges of #bioacoustics in #ornithology

Great to see Whitburn #seawatching data used (through @trektellen.bsky.social) With just 78 Bonxies logged in over 1000 hours observation in 2024, it has been the worst ever year since regular documented seawatching started here. 😢 #NEbirding #seabirds

Impacts of highly pathogenic avian influenza on seabird populations in the North Sea are detectable in sea-watchers’ migration counts Sea-watching counts provided evidence of declines in abundance of four seabird species during autumn migration, which were consistent with the timing of highly pathogenic avian influenza (HPAI) out...

Like London buses, my second paper published in the space of a week! Working on the (substantial) impacts of HPAI on seabirds, it was fascinating to find that population changes in some of the hardest-hit species are reflected in @trektellen.bsky.social seawatch counts. dx.doi.org/10.1080/0006...

Great Skuas (c) Rob Farrow https://commons.wikimedia.org/wiki/File:Two_Bonxies_(Great_Skuas)_in_flight_-_geograph.org.uk_-_6889585.jpg

Great new paper #BirdStudy
Bird flu mortality reflected in #seawatching counts in @trektellen.bsky.social

Impacts of highly pathogenic avian influenza on seabird populations in the North Sea are detectable in sea-watchers’ migration counts
www.tandfonline.com/doi/full/10.... #ornithology #ukbirding