Reposted by Valentijn S. van BergenBenedetta Catitti @bcatitti.bsky.social · 07/09/2026🚨Preprint alert! 🚨What if your study animal doesn't know the landscape yet? Standard movement models such as SSA assume it does. In our new study we let it learn instead, and put "learner" against "omniscient" head to head (1/4) doi.org/10.64898/202... 12920
Reposted by Valentijn S. van BergenBenedetta Catitti @bcatitti.bsky.social · 16/07/2026Out now! What do red kite parents do when food provisioning is covered? Our new study shows that good parenting is about more than just being on the nest. doi.org/10.1111/ibi.... Proud of this first senior authorship w/ @vsvanbergen.bsky.social @urskormann.bsky.social @vogelwarte.bsky.social 0118
Reposted by Valentijn S. van Bergenc0nc0rdance @c0nc0rdance.bsky.social · 12/06/2026Blue lobsters are very rare: 1 in 2 million by some estimates. But SPLIT COLOR LOBSTERS are 1 in *50* million. This lobster is a chimera of two fertilized eggs that fused together, with two distinct genomes: male on one side, female on the other. (📷: Woods Hole Science Aquarium/NOAA Fisheries) 1093460814
Valentijn S. van Bergen @vsvanbergen.bsky.social · 23/01/2026www.theguardian.com/environment/...theguardian.com‘We thought they would ignore us’: how humans are changing the way raptors behaveExperts call for tighter regulation as GPS tracking reveals how people’s behaviour affects the lives of some of the world’s largest birds 010
Reposted by Valentijn S. van Bergensam @samthielman.com · 22/01/2026I just thought everyone should see this 43252985990
Reposted by Valentijn S. van BergenJust Jack @just-jack-1.bsky.social · 20/01/2026Maybe Greenland could invade us instead? 48297973459
Reposted by Valentijn S. van BergenPaul Dufour @pauldufour80.bsky.social · 15/01/2026🚨 PhD offer (please share) Fascinated by bird migration and movement ecology? 🦜🌍 Join us at @vogelwarte.bsky.social to study annual cycle energetics with multi-sensor loggers in multiple species Deadline: 20 Feb 2026 Starting: June 2026 Supervision: Martins Briedis & me Info: tinyurl.com/2dbv9nzh 17495
Reposted by Valentijn S. van BergenPaul Dufour @pauldufour80.bsky.social · 10/01/2026Happy to share our new paper published in @cp-iscience.bsky.social We deployed 300+ multi-sensor loggers across 17 species to investigate how different species adapt their flight strategies when crossing deserts and marine areas during migration. tinyurl.com/2c8y8xvf #ornithology #birds 36939
Reposted by Valentijn S. van BergenBenedetta Catitti @bcatitti.bsky.social · 11/12/2025Winter means.. communal roosts! 🦅🐦🦜 But why do birds form such roosts? In red kites, young single males are the most frequent visitors. Once paired, birds roost more solitarily, often together as a pair. 📢 Now online: tinyurl.tools/98e9279e @animalecology.bsky.social @vogelwarte.bsky.social 02111
Reposted by Valentijn S. van BergenBenedetta Catitti @bcatitti.bsky.social · 17/12/2025Happy to have contributed to a new paper on the wonderful Yelkouan shearwaters, highlighting just how vulnerable this species is to human-driven threats 🌊 0114
Reposted by Valentijn S. van BergenExquisite Corpse @funereel.bsky.social · 13/12/2025Hey don't cry... 60 million icefish nests in a colony twice the size of Paris discovered in the Weddell Sea in 2021 ok??? 952070
Reposted by Valentijn S. van BergenIan Parsons @ianparsons.bsky.social · 09/12/2025There's house painting & then there's house painting... (the eye of the Bonelli's is perfect). #Art #Streetart @iand777.bsky.social @alexanderlees.bsky.social @markbirdingpinoso.bsky.social @laffingkat.bsky.social @pitcarity.bsky.social @brigitstrawbridge.bsky.social #birds 🪶 2304
Reposted by Valentijn S. van BergenSteffen Oppel @steffopp.bsky.social · 14/11/2025NEW PAPER in #ornithology and #conservation reviews the marine threats to #seabirds and other marine #megafauna and confirms that #fisheries are a severe problem: buff.ly/5SXNdqr 01911
Reposted by Valentijn S. van BergenMatthias Tschumi 🦉 @matthiastschumi.bsky.social · 29/10/2025Very happy to finally have this out! 🎉 A review of the diets of European insectivorous birds. Huge thanks to Klaus Birkhofer, @johanekroos.bsky.social, @henrikgsmith.bsky.social and all co-authors! 🙏 #ornithology @biologylu.bsky.social @vogelwarte.bsky.social @helsinki.fi doi.org/10.1016/j.bi... 02914
Reposted by Valentijn S. van BergenSwiss Ornithological Institute @vogelwarte.bsky.social · 30/10/2025Our team analysed the correlation of N deposition with numbers of territories of 112 Swiss breeding birds species. Insectivous and herbivorous species were more negatively associated with N deposistion, as well as ground-nesting species. Read more here: doi.org/10.1111/cobi... 0104
Reposted by Valentijn S. van BergenLeedsBirder @leedsbirder.bsky.social · 15/08/2025Incredible footage of Goshawk predating Hobby chick. Will likely return 😬 - watch live here: www.youtube.com/live/MJaRwj4... #birds #ukbirds #ornithology Web cam by the amazing Wildlife Windows www.wildlifewindows.co.uk 36721
Valentijn S. van Bergen @vsvanbergen.bsky.social · 17/08/2025Yesterday a game keeper asked me to safe a young kite that was stuck up a tree. It had one claw entangled in plastic. In eight years of ringing 1200 kites, I’ve seen every year chicks with ligaments entangled. Some 1-2 % already dies in the nest due to plastic. This one was ‘lucky’ to have fledged. 1188
Reposted by Valentijn S. van BergenBritish Ornithologists’ Union (BOU) @bou.org.uk · 09/07/2025Seed predation by rodents suppresses recruitment of a bird-dispersed tree at its upper range limit | Journal of Animal Ecology | besjournals.onlineli... | #ornithology 🪶🌍🧪 0156
Valentijn S. van Bergen @vsvanbergen.bsky.social · 15/07/2025Spent a week in and around the forests with a nearly invisible beauty of a honey buzzards nest in a silver fir as the highlight of the week. These birds (and their social wasps) seem to have quite a good year. 070
Valentijn S. van Bergen @vsvanbergen.bsky.social · 20/06/2025Over the past 10 years I’ve climbed and controlled some 1000 red kite nests. Here a nest with two chicks that had an apple for lunch. Nutrient wise a useless prey but these birds bring all kinds of human refuse on their nests. 080
Valentijn S. van Bergen @vsvanbergen.bsky.social · 02/05/2025Somehow silly to endlessly keep debating about the basic consensus that the climate is warming due to human caused greenhouse gas emissions. Anyway, quite an insightful 🧵 here. 111
Reposted by Valentijn S. van BergenBirdGuides @birdguides.bsky.social · 29/03/2025Raptor rapture in Georgia Ian Lycett discusses a memorable few days at Batumi in September 2024, where tens of thousands of birds of prey filled the skies: bit.lyGeorgia: raptor raptureIan Lycett reports back from a memorable few days birding at Batumi, Georgia, in September 2024, where tens of thousands of birds of prey filled the skies. Species seen included European Honey Buzzard, Black Kite, Pallid Harrier and Black Stork. 1187
Valentijn S. van Bergen @vsvanbergen.bsky.social · 17/03/2025A reminder to keep fighting for a better world. A healthy, inclusive environment doesn’t come for granted. Not even a million Nobel prizes are worth to maintain a toxic system. 011
Reposted by Valentijn S. van BergenBatumi Raptor Count @batumiraptorcount.org · 15/03/2025Call for Counters! Join BRC in autumn 2025 to witness the magnificent migration of >1 million raptors, improve your ID skills, and contribute to population monitoring! Fees: €10-24/day with discounts available! Read more & apply here: www.batumiraptorcount.org/volunteer-as-raptor-migration-counter 098
Reposted by Valentijn S. van BergenSwiss Ornithological Institute @vogelwarte.bsky.social · 19/02/2025How do ecological factors influence site selection in a Northern Wheatear (Oenanthe oenanthe) population in the Swiss Alps? Y. Rime et al. found that birds were attentive to exposure, slope inclination, and the presence of rockpiles. More on doi.org/10.1007/s103... #ornithologydoi.orgDrivers of nest site selection and breeding success in an Alpine ground-nesting songbird - Journal of OrnithologyBirds breeding in high-Alpine habitats must select a suitable breeding site and achieve successful reproduction within a restricted time. During four breeding seasons, we monitored nest sites of the N... 0103
Reposted by Valentijn S. van BergenBritish Ornithologists’ Union (BOU) @bou.org.uk · 19/02/2025The threat of illegal hunting to raptors migrating through Batumi: bou.org.uk/blog-dane... Read all about it on #theBOUblog by Mitra in both English and Farsi! این بلاگ به زبان فارسی هم در دسترس است ببینید bou.org.uk/blog/extr... @batumiraptorcount.org | #ornithology 01912
Valentijn S. van Bergen @vsvanbergen.bsky.social · 10/02/2025Observing nests with camera's yields quite some fascinating by-catch. Here we see a wood mouse - Apodemus sp. on a nest in a tree crown at 22m. After the birds fledged, this mouse visited it almost every night. It shows that the used habitat of this animal doesn't just consist of the forest floor. 030
Valentijn S. van Bergen @vsvanbergen.bsky.social · 21/01/2025For my Dutch friends: De landelijke roofvogel dag is aanstaande 22 februari in schouwburg Ogterop. Vrije inloop op een dag vol roofvogel onderzoek en verhalen. Zie hier het programma: www.werkgroeproofvogels.nl/index.php/la... 021
Valentijn S. van Bergen @vsvanbergen.bsky.social · 20/01/2025Designed this tool some years ago with Lara gross. It only works if you have some locations in your project over the past month. It saved me many hours checking hundreds of GPS tagged red kites on almost a daily base over the years. 010
Reposted by Valentijn S. van BergenColin Carlson @colincarlson.bsky.social · 15/01/2025🚨😷🧪 NEW: A growing body of evidence shows that pandemics, biodiversity loss, and climate change are part of a broader polycrisis - but there are no simple solutions. A sweeping overview of "Pathogens and planetary change" for the first issue of @natrevbiodiv.bsky.social, out now 🔓 rdcu.be/d6lHl 17541226
Reposted by Valentijn S. van BergenJournal of Applied Ecology @jappliedecology.bsky.social · 03/01/2025Large-scale forest disturbance & associated management shape bird communities in Central European spruce forests 🐦⬛ 🌏 Models revealed that responses are highly species-specific, with shrub-associated birds benefiting from disturbance in general 📊 🧪 🔗buff.ly 03413
Valentijn S. van Bergen @vsvanbergen.bsky.social · 30/12/2024A study to keep in mind this time of the year. Fireworks can be beautiful but is this short moment of joy worth it? 2169
Valentijn S. van Bergen @vsvanbergen.bsky.social · 30/12/2024The whole biosphere is now filled with microplastics, including our own bodies: www.science.org/doi/10.1126/...science.orgTwenty years of microplastic pollution research—what have we learned?Twenty years after the first publication that used the term microplastic, we review current understanding, refine definitions, and consider future prospects. Microplastics arise from multiple sources,... 021
Reposted by Valentijn S. van BergenPer Ahlberg @perahlberg.bsky.social · 23/12/2024An intriguing new evolutionary story has just dropped, from my friend and colleague Leif Andersson: a discrete population of large predatory herring in the Baltic Sea, apparently in the process of evolving into a new species. 🧪 www.nature.com/articles/s41...nature.comEvolution of fast-growing piscivorous herring in the young Baltic Sea - Nature CommunicationsThe Atlantic herring is one of the world’s most abundant vertebrates and a typical plankton feeder of major ecological importance. This study shows that a piscivorous (fish-eating) ecotype of herring ... 413051
Reposted by Valentijn S. van BergenBatumi Raptor Count @batumiraptorcount.org · 21/12/2024Coordinators for 2025! For the first time in BRC history, we have an all-women coordinator team! Elien (NL), Eva (NL), and Mitra (Iran) are ready to lead the 17th Autumn count. However, we still need 9,000 EU to make it happen! 👉 www.batumiraptorcount.org/support 064
Reposted by Valentijn S. van BergenBatumi Raptor Count @batumiraptorcount.org · 17/12/2024Recommended read: The 2024 Autumn report is published! You can now read our extensive report of the past count season, packed with beautiful photos! Of course, don't forget to scroll down for the behind-the-scenes gallery! ➡️ www.batumiraptorcount.org/autumn-repor... 📸 @barthoekstra.bsky.social 11310
Valentijn S. van Bergen @vsvanbergen.bsky.social · 15/12/2024Love those long-term research projects! 021
Reposted by Valentijn S. van BergenSteffen Oppel @steffopp.bsky.social · 14/12/2024NEW JOB in #ornithology to track nutcrackers through alpine forests in #Switzerland: my.jobalino.ch/job/de/673f6...my.jobalino.chTechnische Assistenz Samenverbreitung Tannenhäher | 80% - 100%Die Schweizerische Vogelwarte ist eine gemeinnützige Stiftung für Vogelkunde und Vogelschutz, die Grundlagenforschung, angewandte Forschung und praktische Umsetzung unter einem Dach vereint. Mehr als ... 02926
Reposted by Valentijn S. van BergenBatumi Raptor Count @batumiraptorcount.org · 14/12/2024Keep the Batumi Raptor Count flying high with your support! Your generosity will help us to continue our world-class monitoring in the Batumi bottleneck in 2025. Please read our full appeal here: 👉 www.batumiraptorcount.org/news/2024/12... 065
Reposted by Valentijn S. van BergenRob Barber @ra-barber.bsky.social · 13/12/2024Big news! 🎉 My first PhD chapter has been published in @PLOSBiology, and it just made the cover! 🐦🌍 Perfect time to dive into the key findings from our global study on sexual selection in birds. 🧵👇 📖 Read the paper: doi.org/10.1371/jour... 37723
Reposted by Valentijn S. van BergenDan Baldassarre @evornithology.bsky.social · 11/12/2024Look at this map. Look at it! This is what Amur Falcons do! Their migration is jaw-dropping. You do not want to miss Suresh Kumar's @birdsoftheworld.bsky.social webinar next week! birdsoftheworld.org/bow/news/amu... 1327358
Reposted by Valentijn S. van BergenDr Katrina Siddiqi-Davies @katrina-siddiqi.bsky.social · 11/12/2024We are hiring a Field Assistant for 2025. 🌊Are you starting your career as a seabird biologist? 🏀Excited at the prospect of remote work on UK islands? 🌧️❄️Happy to work outside in unusual 'summer' weather conditions? For more info on applying: drive.google.com/file/d/1byRm... 13439
Reposted by Valentijn S. van BergenRichard D. Gregory @richgreg3.bsky.social · 11/12/2024NEW Decline of European bird populations continues especially birds of farmland. Pan-European Common Bird Monitoring Scheme (PECBMS) presents updated wild bird indices 1980–2023. Data = 168 bird species 30 countries⬇️ @rspb.bsky.social @birdlifeeurope.bsky.social @ec.europa.eu @uclcber.bsky.social 📉🐦 01312
Reposted by Valentijn S. van BergenBritish Ornithologists’ Union (BOU) @bou.org.uk · 11/12/2024Niche Distribution Pattern of Rüppell's Vulture (Gyps rueppellii) and Conservation Implication in Kenya | doi.org/10.1002/ece3... | Ecology and Evolution | #ornithology #RaptorResearch 🪶 0305
Valentijn S. van Bergen @vsvanbergen.bsky.social · 07/12/2024Some impressions of our field work of the past 5 years in which we collected data on the vespid diet of honey buzzards. To investigate the prey use by this insectivore specialist, we collected empty wasp combs from the nests during the chick rearing phase. 1/9 1312
Reposted by Valentijn S. van BergenBritish Ornithologists’ Union (BOU) @bou.org.uk · 09/10/2024EARLY VIEW in IBIS Predicting anthropogenic food supplementation from individual tracking data | onlinelibrary.wiley.... Steffen Oppel, Nathalie Heiniger, Patrick Scherler, Valentijn S. van Bergen, Jérôme Guélat, Robert Weibel, Martin U. Grüebler | #ornithology 052
Reposted by Valentijn S. van BergenJournal of Avian Biology @avianbiology.bsky.social · 16/11/2024IN-DEPTH: Read the blogpost about the new 'NestTool' application developed by Steffen Oppel and colleagues that can be used to to assess the reproductive performance of red kites. ➡️ www.avianbiology.org... #ornithology #birds #telemetry 0162
Valentijn S. van Bergen @vsvanbergen.bsky.social · 06/12/2024Please sign this to help the fight against criminal wildlife poisoning: bit.ly/4eVlW9qbit.lyPetition unterschreibenCampaign against criminal Poisoning of European Wildlife (CPEW) 000
Reposted by Valentijn S. van BergenBritish Ornithologists’ Union (BOU) @bou.org.uk · 05/12/2024NEW on #theBOUblog from @stevedudley.bsky.social The ornithology community is growing on Bluesky, here's why you should consider this alternative to Twitter | bou.org.uk/blog-dudl... #ornithology 0316