Freddie Mckendrick

@freddiemckendrick.bsky.social

Behavioural ecologist oddly interested in the individuality of how, why and where animals move. Postdoc with @niozsearesearch.bsky.social investigating all things red knot and their food. https://freddiemckendrickecology.carrd.co/

🚨Very happy to share our new paper out in @currentbiology.bsky.social! 🦉 We show that barn owl colour morphs do not simply experience moonlight differently — they hunt differently under it. White morphs appear to turn bright moonlight into a hunting advantage. 1/3 #movementecology #barnowl #moon

Cell Press@cellpress.bsky.social · 2mo ago

"Barn owl color morphs hunt differently in moonlight" Learn more in Current Biology: www.cell.com/current-biol... Kim Schalcher, @pbecciu.bsky.social, @owlsforpeace.bsky.social & colleagues @currentbiology.bsky.social

This figure illustrates the study area, color polymorphism, and method used to reconstruct attack trajectories from GPS, accelerometry, and pressure data.

Two out of the (only) three White-tailed Eagles fledged in England in 2025 have since 'disappeared in suspicious circumstances', i.e. people killed them within months. Read this, and see how much effort those people go to, to kill them. We all know who & why. Two out of three. Within months.

Raptor Persecution UK@raptorpersuk.bsky.social · 2mo ago

More news on the satellite-tagged White-tailed Eagle that 'disappeared' on a grouse shooting estate in the North York Moors National Park. #RaptorResearch #WildlifeCrime raptorpersecutionuk.org/2026/06/03/m...

Amazing photos by @northronbirdobs.bsky.social of one of our tracked knots, Arenicola with Tellina also skulking around on the island somewhere. So cool to see the knots a lot fatter now than when we deployed the loggers in February and photos like this help so much with the tagging efforts!

North Ronaldsay Bird Observatory@northronbirdobs.bsky.social · 3mo ago

The newly ploughed observatory crop has played host to a colour-ringed Knot in the past few days. Initially seen in poor weather and post submission we discovered it’s also carrying a geo-locator from @globalflyway.bsky.social you can follow Arenicola’s progress on the globalflyways network website

🥳 New paper alert 🥳 The first of the data chapters from my DPhil, and the works from my first few field seasons on Skomer, is out! "Shearwaters make efficient navigational decisions, even at very fine scales" - doi.org/10.1242/jeb.... A huge thank you to everyone involved 🩵

Shearwaters make efficient navigational decisions, even at very fine scales

Summary: A fine-scale displacement of Manx shearwaters, a wide-ranging pelagic seabird, reveals that they preferentially adopt shorter homing routes following release at proximal sites, demonstrating ...

doi.org

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

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 🪶

Reminder that you can still follow our tracked knots as they gear up for their migration. Nephtys (dark blue off Cuxhaven) continued its journey North last night and is now up with it's compatriots on the German/Danish Wadden Sea border! Who will make the first leap and head to the breeding grounds?

Global Flyway Network@globalflyway.bsky.social · 4mo ago

Don't forget to look, every few days, at the amazing tracks of red #knots (tagged by team Bijleveld @ Royal NIOZ, Texel): www.globalflywaynetwork.org/tracks/speci... This is part of project WAAKVOGELS www.waakvogels.nl/trekvogels/k... Within a fortnight they likely migrate on to Iceland or Norway!

🚨🚨 Breaking news from Wytham Woods: The 80th year of data collection of the long-term tit study officially started today with this nest with 3 Blue Tit eggs (pic: @mcmahok.bsky.social). First egg inferred 23 March which is our earliest EVER nest - beating the previous record of 26 March by 3 days!🚨🚨

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Behind schedule with this but it was also very nice to see one of my PhD chapters officially come out in @animalecology.bsky.social last week! This one felt like a long road but came from a great collaboration and highlights the importance of long-term time series! 🧵below...

Journal of Animal Ecology@animalecology.bsky.social · 5mo ago

🚨 new research! 🪽 "environmentally induced stress affects fitness of bold and shy alike: A long-term study of personality and feather corticosterone in Arctic-breeding kittiwakes" 🔍️ read it here: buff.ly/Zj9b7z0

Great to see this paper by Tash out now in @royalsocietypublishing.org. Beautiful piece of work bringing together an impressive dataset to show the flexibility in diel patterns of kittiwakes. Pleasure to be a part of!

Tash Gillies@tashgillies.bsky.social · 5mo ago

Delighted to see our paper out today in Proceedings B @royalsocietypublishing.org! We investigated how kittiwakes adapt their activity patterns across latitudes in response to the changing day-night cycle ☀️🌃 In short - we find that Arctic kittiwakes don't have bedtimes.. doi.org/10.1098/rspb... 🧵1/4

The title block of a research paper in Proceedings B. The title is 'Evidence for latitude-driven changes in diel rhythms in a wide-ranging seabird' by Natasha Gillies and co-authors. It includes the journal logo and the DOI link.

The first drone census of the St Kilda gannet colony is now published in Scottish Birds! We counted 59,205 AOS in 2023 - similar to previous years. The overall impact of #HPAI appears less than at some other colonies, with notable declines in flatter areas 🧮 #ornithology #seabirds #NTSseabirds

(PDF) The first drone census of the Gannet colony on St Kilda, 2023

PDF | An Unmanned Aerial Vehicle (hereafter drone) survey of Gannets at St Kilda was carried out in June 2023. The survey was the first census at St... | Find, read and cite all the research you need ...

researchgate.net