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Tohar Tal

@tohar-tal.bsky.social

40 Posts921 Follower 751 Folgt

Tohar Tal @tohar-tal.bsky.social · last wk.

How does personality affect spring migration timing in Red Knots? We combined experimental food manipulations, measures of exploration speed, and individual tracking to find that fast-exploring birds delayed departure, but only after restricted food access. Read more in our paper👇

British Ornithologists’ Union (BOU)@bou.org.uk · 2w ago

EARLY VIEW in IBIS Exploration speed in Red Knots affects spring migration timing, but only after experimentally constrained fuelling conditions | onlinelibrary.wiley.... Tohar Tal, Allert I. Bijleveld, Karein van Bijssum, Hidde Kressin, Thomas K. Lameris | #ornithology

British Ornithologists’ Union (BOU)@bou.org.uk · 2w ago

Paul Dufour @pauldufour80.bsky.social · 4w ago

🐦🌙 Happy to see this big collaborative paper out in @currentbiology.bsky.social! We address a seemingly simple question using geolocator data collected across many species and individuals: how much of bird migration actually happens at night? www.cell.com/current-biol... A short🧵

British Ornithologists’ Union (BOU)@bou.org.uk · last mo.

🔈 APPLICATIONS OPEN... ...for BOU Small Research Grants & Career Development Bursaries Application deadline: 30 Oct 2026 Full details via links ⬇️ Grants: bou.org.uk/funding/s... Bursaries: bou.org.uk/funding/c... #ornithology 🪶

British Ornithologists’ Union (BOU)@bou.org.uk · 2mo ago

🔈 NOMINATIONS OPEN Know someone in #ornithology deserving of recognition? Nominate them for a BOU award now! 🪶 🥇 Godman Salvin Prize 🥇 Alfred Newton Lecture 🥇 Janet Kear Union Medal 🥇 Early Professional Award Deadline: 15 September 2026 Nominate: bou.org.uk/about-the... 🪶

Antonia Klöcker @cakloecker.bsky.social · 3mo ago

📢 New IMR study on movement patterns of #BaskingSharks shows that sharks tagged above the #ArcticCircle in #Norway perform repeated large-scale movements to subtropical waters and actively use the water column across habitats.🧵 1/5 👉 doi.org/10.3354/meps... @whoi.edu @thembauk.bsky.social

Map of the showing seasonal shark migration routes in the Northeast Atlantic. Sharks move to the Norwegian and Barents Seas in summer (May–July), the Icelandic Basin in autumn (September–December), and the Western European Basin in winter (January–March). Colored arrows indicate migration paths of the sharks illustrated as black silhouettes.

Marine Ecology Progress Series@meps-ir.bsky.social · 3mo ago

🦤🌐🧪 Year-long satellite tracking of basking sharks revealed ~14,000 km migrations spanning 30° latitude. This includes a transatlantic journey from Norway to the Caribbean highlighting the need for pan-latitudinal research. #FeatureArticle bit.ly/meps15153 @cakloecker.bsky.social

A basking shark is filter-feeding in surface waters. The shark is shown from the bird-perspective with its tail movement and the spread gills being visible.

British Ornithologists’ Union (BOU)@bou.org.uk · 3mo ago

NEW on #theBOUblog from Alejandro Corregidor‐Castro When conservation tools turn context dependent bou.org.uk/blog-corr...‐castro-when-conservation-tools-turn-context-dependent Based on this IBIS paper doi.org/10.1111/ibi.... #ornithology 🪶

Pablo Macias Torres @pablomaciastorres.bsky.social · 4mo ago

Small migratory birds cross deserts and seas as part of their annual migration. But how? Our new study shows how thrush nightingales do it: by flying night after night and stopping during the day, when they remain innactive🐦➡️(1/3) doi.org/10.1098/rsbl... @royalsocietypublishing.org #BirdMigration

Figure in the main study showing the migration route and diurnal locomotion along their migratory journey

British Ornithologists’ Union (BOU)@bou.org.uk · 3mo ago

EARLY VIEW in IBIS Low breeding propensity in a declining Arctic-breeding swan revealed by telemetry data | onlinelibrary.wiley.... Tohar Tal, Bart A. Nolet, Tom S.L. Versluijs, Judy Z. Shamoun-Baranes, Götz Eichhorn, Sabine Urban, Hans Linssen | #ornithology 🪶

Tohar Tal @tohar-tal.bsky.social · 3mo ago

Why are Bewick’s Swans declining? Here, we set out to answer this question by breaking down the reproductive cycle of the rapidly declining Western Palearctic population, using both GPS/ACC and citizen-science data. Click the link below to read the full story! @hanslinssen.bsky.social

British Ornithologists’ Union (BOU)@bou.org.uk · 3mo ago

Batumi Raptor Count @batumiraptorcount.org · 4mo ago

⏳ Just 7 days to apply for the Flyway Monitoring Traineeship Spend a month at Batumi Raptor Count, learning hands-on migration monitoring in one of the world’s largest raptor flyways. Fully funded travel + acco. Open to conservationists in OSME region. www.batumiraptorcount.org/flyway-monit... 🪶🦅

BRC Flyway Monitoring Traineeship — Batumi Raptor Count

We are raising \u20AC30,000 to continue our monitoring, conservation and education work in 2026.

batumiraptorcount.org

Batumi Raptor Count @batumiraptorcount.org · 4mo ago

Call for Counters! Join BRC in Autumn 2026 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

Batumi Raptor Count @batumiraptorcount.org · 4mo ago

Our 2026 Flyway Monitoring Traineeship is open for applications from raptor enthusiasts living in the OSME region. Learn all about raptor migration, identification and what it takes to run a count like the BRC, and receive up to €1300 to cover costs. www.batumiraptorcount.org/flyway-monit... 🪶

Spurn Bird Observatory @spurnbirdobs.bsky.social · 5mo ago

Want a year at one of the UK’s top bird observatories? We’re offering a 12-month Conservation Internship at Spurn — a unique chance to gain real experience in monitoring, conservation and migration. Apply now 👇 spurnbirdobservatory.co.uk/news/conserv...

Sayam U. Chowdhury @sayamchowdhury.bsky.social · 5mo ago

Pleased to share the Spoon-billed Sandpiper Action Plan (2025–2035) -- a major collaborative effort, bringing together science, conservation priorities, evidence and inputs from across the flyway. Scan the QR code or follow the link [below] to access the full document tinyurl.com/326r23d7

David Toews @davetoews.bsky.social · 5mo ago

Heading into conference abstract / presentation season, I 100% recommend Kathryn Langin's (@kangin.bsky.social) "Tell me a story! A plea for more compelling conference presentations". It's short, sweet, and not just for ornithologists. I can get behind every word! 🔒 academic.oup.com/condor/artic...

De Groene Amsterdammer @groene.nl · 5mo ago

Hij houdt vast aan het internationaal recht, zegt nee tegen de oorlog met Iran en vaart een eigen, mildere migratiekoers. De Spaanse premier Pedro Sánchez is uitgegroeid tot de Europese anti-Trump. Raakt hij daardoor in een internationaal isolement?

De Spaanse premier Sánchez is een van de weinigen die zich uitspreekt tegen Trump – met het risico op internationaal isolement

buff.ly

Tohar Tal @tohar-tal.bsky.social · 5mo ago

NEW PUBLICATION! Long time coming — now out: the results of our pilot spring raptor counts in Batumi! Read about seasonal contrasts in raptor migration, the eastern Black Sea coast as a principal spring flyway, and much more. 🦅 Paper: doi.org/10.5253/arde... #ornithology @batumiraptorcount.org

British Ornithologists’ Union (BOU)@bou.org.uk · 5mo ago

NEW on #theBOUblog from Heather Fortune World Book Day 2026! Recommendations from BOU Council and Committee members bou.org.uk/blog-fort... #ornithology 🪶

Graham Appleton @wadertales.bsky.social · 5mo ago

Waders in a changing climate? New WaderTales blog: wadertales.wordpress.com/2026/02/28/m... To coincide with paper published on Saturday: onlinelibrary.wiley.com/doi/full/10.... #Iceland #ConservationScience🌍

Graham Appleton @wadertales.bsky.social · 6mo ago

Social learning in Black-tailed Godwits - where to find food? Summary of new paper in @asab.org journal by Josh Nightingale is summarised in this blog: wadertales.wordpress.com/2026/02/05/l... Paper: www.sciencedirect.com/science/arti... #ConservationScience🌍

Composite image - a feeding flock of Icelandic Black-tailed Godwits and image of front page of new blog.

Graham Appleton @wadertales.bsky.social · 6mo ago

Redshank - is this a cry for help? Icelandic waders are under pressure - roads, summer houses, power lines, forestry are all having effects: wadertales.wordpress.com/2025/02/20/i... Paper by Aldis Pálsdóttir and colleagues summarised in WaderTales blog 20 Feb 2025 🎂 #ornithology

Andrew Straw @andrewstraw.bsky.social · 6mo ago

Using our bee-tracking drone, we discovered that honey bees 🐝 have highly precise and individual routes. Now published at @currentbiology.bsky.social : doi.org/10.1016/j.cu...

Andrew Straw@andrewstraw.bsky.social · 8mo ago

Have you ever wondered what you would find if you could keep your eyes on a bee for more than a few meters? Us, too! preprint (with videos!) + thread 🧵 Precise, individualized foraging flights in honey #bees 🐝 revealed by multicopter drone-based tracking www.biorxiv.org/content/10.6... 1/9

Batumi Raptor Count @batumiraptorcount.org · 7mo ago

Recommended read: our 2025 Autumn Report is out! As part of our tradition and commitment, we’ve compiled a comprehensive overview of the season’s highlights and phenological peculiarities — complemented by many beautiful photos of both birds and people! 👉 batumiraptorcount.org/autumn-report-2025

Short-toed Eagle. Photo by Nikolina Bukovac.

Kane Brides 🦆@kanebrides.bsky.social · 8mo ago

📉 Our new paper shows Bewick’s Swan numbers in NW/NE Europe have fallen to ~12,900 birds - a 56.7% decline since 1995, with further losses predicted by 2026 unless survival or breeding success improves. Flyway-wide conservation is urgent. 🦢 Download paper > tidsskrift.dk/Wildfowl/art... #Ornithology

A flock of Bewick's Swans by Ben Cherry/WWT

Kyle Horton @kyle-horton.bsky.social · 9mo ago

Take three minutes to look at pretty birds, explore radar data, and see how we connect the structure of skies to MacArthur's ideas of niche partitioning. 📡🐦☁️🎧

Structuring the skies: Diel dynamics of migratory animalmovement in the lower atmosphere

YouTube video by Kyle Horton

youtu.be

Kyle Horton@kyle-horton.bsky.social · 9mo ago

We churned through over 100 million radar samples to quantify the structure of migration through the airspaces across the United States: Just out in Ecology esajournals.onlinelibrary.wiley.com/doi/epdf/10....

Batumi Raptor Count @batumiraptorcount.org · 9mo ago

A typical Batumi migration scene, illustrating the idea of an ‘aerial niche’. For Steppe Buzzards in our bottleneck, that niche is often somewhere between the clouds: great to watch, tricky to count. Fascinating paper by @cnilsson.science et al: doi.org/10.1016/j.tr... 📸 @barthoekstra.bsky.social

Trends in Ecology & Evolution@cp-trendsecolevo.bsky.social · 9mo ago

November issue out online now www.cell.com/ecology-evol... We hope you enjoy it! The cover article is by Cecilia Nilsson and colleagues, photo by Bart Hoekstra The penultimate interviews in our Disability series feature John Dennehy and Tara Cronin

Hadley Wickham @hadley.nz · 9mo ago

filter_out() = yeet()

Davis Vaughan@davisvaughan.bsky.social · 9mo ago

We are looking for #rstats community feedback on 3 new dplyr functions! We're aiming to expand the `filter()` family: - `filter()` to keep rows - `filter_out()` to drop rows - `when_any()` and `when_all()` as modifiers Read more and leave feedback here: github.com/tidyverse/ti...

Example of using `filter_out()` on the `penguins` dataset, showing how it is much easier than `filter()`, especially with `NA`s

British Ornithologists’ Union (BOU)@bou.org.uk · 9mo ago

Dispersal, maturation and recruitment in a long-lived, intercontinental migrant bird | www.sciencedirect.co... | Animal Behaviour | #ornithology 🪶

Bart Hoekstra @barthoekstra.bsky.social · 9mo ago

To reduce negative impacts of #renewables (eg #windenergy) on migrating birds, we need to know *where* and how *high* they fly. Using weather radar, we mapped 6yrs of nocturnal migration over the Netherlands, revealing patterns we can use to avoid and minimize impacts: doi.org/10.1016/j.je... 🧪🪶

Fig. 2. Maps of nocturnal bird migration across the Netherlands in spring and autumn, with the 100 km radius circles of the weather radars enclosing the onshore study area. Colors represent seasonal migration passage, converted from the original bird densities. Shaded areas mark grid cells for which over 25% of the input data, prior to filtering, were impacted by ground clutter. Migration passage in these regions may be compromised in either direction: overestimated due to remaining clutter artifacts or underestimated where terrain features partially obstruct the radar’s lower scanning angles.

Fig. 1. Flight altitude distributions (in m above sea level (asl)) of nocturnal bird migration for both Dutch weather radars at a coastal Den Helder and inland site Herwijnen. Bar length denotes the proportion of migration within the respective altitude range (50 m vertical resolution). Donut charts aggregate this further to coarser 200-m classes and display the proportion of migration occurring above 1000 m (patterned). Red highlights indicate the altitude range of onshore energy infrastructure in the Netherlands, which is generally present in the lowest 200 m of the atmosphere. Donut chart proportions do not sum to 100% due to rounding. The small inset map of the Netherlands shows the locations of both radars (solid dots) and the surrounding areas up to 35 km (circles) from which altitude distributions are aggregated.

Fig. 3. a, c Observed combinations of migration passage and mean wind power density, a measure of wind power potential, in North-Holland. Red circles represent average values for candidate sites and their size reflects the relative candidate site area. The grid reflects binned values of migration and wind power density, with color shading indicating the type of combination: orange = high migration passage, blue = high wind power density, dark browns and blues = both high. White lines indicate averages for wind power density and seasonal migration passage. b Spatial distribution of autumn migration (orange hues) and wind energy (blue hues) in North-Holland. Candidate wind energy sites are shown in bright red. The highest and lowest autumn migration passage sites are linked to their positions in a and c, emphasizing large differences between sites in autumn, but not in spring. Shaded areas mark grid cells for which over 25% of the input data, prior to filtering, were impacted by ground clutter. Migration passage in these regions may be compromised in either direction: overestimated due to remaining clutter artifacts or underestimated where terrain features partially obstruct the radar’s lower scanning angles.