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Valentijn S. van Bergen

@vsvanbergen.bsky.social
824 followers 750 following 41 posts

Studying the largest insectivore🐝 animal of Europe, the Honey buzzard🦅🪶. Phenology, food availability and food use for reproduction 🪺🐥. www.researchgate.net/profile/Valent…

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Reposted by Valentijn S. van Bergen
Benedetta 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...
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Reposted by Valentijn S. van Bergen
Benedetta Catitti @bcatitti.bsky.social · 16/07/2026
Out 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
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Reposted by Valentijn S. van Bergen
c0nc0rdance @c0nc0rdance.bsky.social · 12/06/2026
Blue 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)
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 23/01/2026
www.theguardian.com/environment/...
theguardian.com
‘We thought they would ignore us’: how humans are changing the way raptors behave
Experts call for tighter regulation as GPS tracking reveals how people’s behaviour affects the lives of some of the world’s largest birds
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Reposted by Valentijn S. van Bergen
sam @samthielman.com · 22/01/2026
I just thought everyone should see this
Dr Kareem Carr
man: i wish to publish
@kareem_carr
Jan 21
reviewer 2: your paper is no good
man: i'll do anything to improve
reviewer 2: it's simple. you must read the work of the great scientist Pagliarini
man: *bursts into tears* but i am Pagliarini
Andre Pagliarini
@apagliar
Jan 21
a first: in rejecting an article I submitted to a journal, reviewer 2 noted I failed to engage the work of one Andre Pagliarini
Jan 21, 2026 • 3:47 PM UTC
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Reposted by Valentijn S. van Bergen
Just Jack @just-jack-1.bsky.social · 20/01/2026
Maybe Greenland could invade us instead?
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Reposted by Valentijn S. van Bergen
Paul 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
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Paul Dufour @pauldufour80.bsky.social · 10/01/2026
Happy 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
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Benedetta Catitti @bcatitti.bsky.social · 11/12/2025
Winter 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
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Reposted by Valentijn S. van Bergen
Benedetta Catitti @bcatitti.bsky.social · 17/12/2025
Happy to have contributed to a new paper on the wonderful Yelkouan shearwaters, highlighting just how vulnerable this species is to human-driven threats 🌊
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Exquisite Corpse @funereel.bsky.social · 13/12/2025
Hey don't cry... 60 million icefish nests in a colony twice the size of Paris discovered in the Weddell Sea in 2021 ok???
Overhead view of several crocodile icefish nests on the sea bottom. They're simple circular nests dug into the sand and most of them are guarded by one icefish each. The icefish live in Antarctica and are remarkable in that they are the only vertebrates whose adults produce no hemoglobin due to a genetic mutation. Icy water environment, unusually robust cardiovascular system and an antifreezing agent produced in their bodies are some of the factors that make their survival possible. Icefish have a tapered body with three large rayed fins, and large eyes. They are blue-ish white, and appear pearlescent and transculent, as their blood lacks the usual red colour.Another overhead picture of icefish nests
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 09/12/2025
Absolute dream job..
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Reposted by Valentijn S. van Bergen
Ian Parsons @ianparsons.bsky.social · 09/12/2025
There'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 🪶
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Steffen Oppel @steffopp.bsky.social · 14/11/2025
NEW 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
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Matthias Tschumi 🦉 @matthiastschumi.bsky.social · 29/10/2025
Very 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...
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Reposted by Valentijn S. van Bergen
Swiss Ornithological Institute @vogelwarte.bsky.social · 30/10/2025
Our 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...
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Reposted by Valentijn S. van Bergen
LeedsBirder @leedsbirder.bsky.social · 15/08/2025
Incredible 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
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 17/08/2025
Yesterday 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.
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British Ornithologists’ Union (BOU) @bou.org.uk · 09/07/2025
Seed predation by rodents suppresses recruitment of a bird-dispersed tree at its upper range limit | Journal of Animal Ecology | besjournals.onlineli... | #ornithology 🪶🌍🧪
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 15/07/2025
Spent 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.
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 20/06/2025
Over 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.
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 02/05/2025
Somehow 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.
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BirdGuides @birdguides.bsky.social · 29/03/2025
Raptor 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.ly
Georgia: raptor rapture
Ian 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.
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 17/03/2025
A 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.
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Batumi Raptor Count @batumiraptorcount.org · 15/03/2025
Call 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
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Swiss Ornithological Institute @vogelwarte.bsky.social · 19/02/2025
How 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... #ornithology
doi.org
Drivers of nest site selection and breeding success in an Alpine ground-nesting songbird - Journal of Ornithology
Birds 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...
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Reposted by Valentijn S. van Bergen
British Ornithologists’ Union (BOU) @bou.org.uk · 19/02/2025
The 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
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 10/02/2025
Observing 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.
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 21/01/2025
For 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...
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 20/01/2025
Designed 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.
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Reposted by Valentijn S. van Bergen
Colin 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
Top panels: graphs showing increases in spillover events, extinction rates, and temperature anomalies over the last few centuries. Bottom panel: a map of 10 pandemics since the year 1900. Four were linked to agriculture, two to wildlife use, and one to climate change.
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Journal of Applied Ecology @jappliedecology.bsky.social · 03/01/2025
Large-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
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 30/12/2024
A study to keep in mind this time of the year. Fireworks can be beautiful but is this short moment of joy worth it?
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 30/12/2024
The whole biosphere is now filled with microplastics, including our own bodies: www.science.org/doi/10.1126/...
science.org
Twenty 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,...
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Per Ahlberg @perahlberg.bsky.social · 23/12/2024
An 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.com
Evolution of fast-growing piscivorous herring in the young Baltic Sea - Nature Communications
The 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 ...
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Batumi Raptor Count @batumiraptorcount.org · 21/12/2024
Coordinators 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
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Batumi Raptor Count @batumiraptorcount.org · 17/12/2024
Recommended 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
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 15/12/2024
Love those long-term research projects!
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Steffen Oppel @steffopp.bsky.social · 14/12/2024
NEW JOB in #ornithology to track nutcrackers through alpine forests in #Switzerland: my.jobalino.ch/job/de/673f6...
my.jobalino.ch
Technische 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 ...
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Batumi Raptor Count @batumiraptorcount.org · 14/12/2024
Keep 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...
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Rob Barber @ra-barber.bsky.social · 13/12/2024
Big 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...
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Dan Baldassarre @evornithology.bsky.social · 11/12/2024
Look 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...
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Dr Katrina Siddiqi-Davies @katrina-siddiqi.bsky.social · 11/12/2024
We 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...
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Richard D. Gregory @richgreg3.bsky.social · 11/12/2024
NEW 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 📉🐦
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British Ornithologists’ Union (BOU) @bou.org.uk · 11/12/2024
Niche Distribution Pattern of Rüppell's Vulture (Gyps rueppellii) and Conservation Implication in Kenya | doi.org/10.1002/ece3... | Ecology and Evolution | #ornithology #RaptorResearch 🪶
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 07/12/2024
Some 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
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British Ornithologists’ Union (BOU) @bou.org.uk · 09/10/2024
EARLY 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
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Journal of Avian Biology @avianbiology.bsky.social · 16/11/2024
IN-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
Red kite. Photo: Patrick Scherler
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Valentijn S. van Bergen @vsvanbergen.bsky.social · 06/12/2024
Please sign this to help the fight against criminal wildlife poisoning: bit.ly/4eVlW9q
bit.ly
Petition unterschreiben
Campaign against criminal Poisoning of European Wildlife (CPEW)
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British Ornithologists’ Union (BOU) @bou.org.uk · 05/12/2024
NEW 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
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