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Ed Kroc

@edkroc.bsky.social
583 followers 217 following 97 posts

Statistician, gull lover. At UBC, Vancouver, Canada. I like math, statistics, science, and seabirds. Blog: edkroc.wordpress.com Salish Sea Urban Gull Monitoring Program: ekroc.weebly.com/salish-sea-urban-g…

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Reposted by Ed Kroc
Common Tern Project @commonternproject.bsky.social · 12/11/2025
There’s one month left to apply for the PhD position on interactions between contaminants and parasites in common terns, co-supervised by @alicecarravieri.bsky.social, Bernd Sures from @unidue.bsky.social and myself. You can do so here: euraxess.ec.europa.eu/jobs/380142
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Víctor Martín-Vélez @victormartinvel.bsky.social · 08/11/2025
Interested in spatial ecology & One Health in urban gulls? 🧪 Join us at @imares-group.bsky.social @icmcsic.bsky.social as a #JdC postdoc in the #ALLIES project! 📅 Apply by Dec 10 📩 Contact: joan@icm.csic.es 🔗 See the call: acortar.link/yhYLRt #Postdoc #AppliedEcology #UrbanEcology #OneHealth
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Charles Margossian @charlesm993.bsky.social · 07/11/2025
Applications for the PhD and MSc programs in statistics at UBC are now open! 📆 Deadline for PhD program is December 1st 📆 Deadline for MSc program is January 5th The department covers all areas of statistics and we have a lot of momentum in Bayesian computation!
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Ed Kroc @edkroc.bsky.social · 17/07/2025
Look to the rooftops.
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Ed Kroc @edkroc.bsky.social · 14/07/2025
Lots of little gull floofs at the Tsawwassen ferry terminal this morning.
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Ed Kroc @edkroc.bsky.social · 10/07/2025
Hello, Sechelt. There are two rooftop GW Gull nests in this picture. Can you guess where? Answer below.
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Michelle Wille @duckswabber.bsky.social · 10/07/2025
In the UK, 2021-2023, 103,497 carcasses of 155 species tested for HPAI. Gannets, Black-headed Gulls, Barnacle Goose most affected. 7500 +ve for HPAI across 80 species. Mortality data to estimate impact. 👉 www.tandfonline.com/doi/full/10....
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Michelle Wille @duckswabber.bsky.social · 10/07/2025
Across 13 European countries, only 3 dead Little Terns found in 2022-2023, amongst tens of thousands of breeding birds. Surprising given how other tern species have been impacted. 👉 www.tandfonline.com/doi/full/10....
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British Ornithologists’ Union (BOU) @bou.org.uk · 04/07/2025
Partial Niche Partitioning in Three Sympatric Gull Species Through Foraging Areas and Habitat Selection | doi.org/10.1002/ece3... | Ecology and Evolution | #ornithology #seabirds 🪶
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Maudeux.creations 🎨🐦 @maudeuxcreations.bsky.social · 21/06/2025
the ivory gull, one of the most fascinating birds of the Far North! It stays in the Arctic all winter and follows polar bears to feed on the leftovers of their kills — a brilliant and icy survival strategy ❄️🐻‍❄️ #birdart #wildlifeart #sketchbook #seabirds #natureillustration 🌿 #SciArt 🐡
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Maudeux.creations 🎨🐦 @maudeuxcreations.bsky.social · 14/06/2025
More Arctic gulls! The Sabine’s gull is a beautiful bird I dream to see one day! This watercolor is part of my “Arctic Larids” poster, available as a print in Maudeux Redbubble shop. #birdart #wildlifeart #sketchbook #sabinesgull #natureillustration #scientificillustration 🌿 #SciArt 🐡
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Maudeux.creations 🎨🐦 @maudeuxcreations.bsky.social · 11/06/2025
Sketches of the Mediterranean gull... I quite like the one sunbathing 😎 These humorous drawings are based on real biology! #birdart #characterdesign #natureillustration #sketchbook #wildlifeart #MediterraneanGull #funnybirds #nonbreedingplumage 🌿 #SciArt 🐡 #FieldworkSketches
Sketches of mediterranean gull characters. They are enjoying the sun with sunglasses and cocktail. The idea is to illustrate its wintering grounds—far from the cold of Northern Europe ❄️.
So the bird is shown in its non-breeding plumage (yes, the black head is just for summer!)Sketches of mediterranean gull characters. One is flying, an other one on the water and an other one is taking off its sunglasses. Sketches of mediterranean gull characters. One has a breeding plumage and try to seduce a partner and the other one is looking at it's tags on its legs...
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Eldar Rakhimberdiev @eldarrak.bsky.social · 13/06/2025
New PhD position in our group! Join us to study gull foraging ecology at sea using GPS and accelerometry data! You will be working here Amsterdam Movement Ecology group under supervision of @judyshamounb.bsky.social, @rooskentie.bsky.social and me. Apply here werkenbij.uva.nl/en/vacancies...
werkenbij.uva.nl
Vacancy — PhD Position Gull Foraging Ecology in the North Sea - NO-REGRETS Project
Are you passionate about animal movement ecology? Interested in studying gull foraging ecology at sea? Apply for this unique PhD opportunity at the Department of Theoretical and Computational Ecology ...
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Common Tern Project @commonternproject.bsky.social · 08/06/2025
Weekend loveliness: retrapping a gull-billed tern carrying a GPS and getting to know a few of the newest colony members.
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Ed Kroc @edkroc.bsky.social · 06/06/2025
A nice article on urban gulls' eating habits that doesn't paint them in a negative light. With some commentary from me, @alice-risely.bsky.social and others. www.wsj.com/articles/sci...
wsj.com
Scientists Can’t Get Enough of Watching Seagulls Steal Your Food
Birds’ ability to seamlessly swap marine food for a Big Mac—and outwit humans to get it—is a source of fascination
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The Waterbird Society @waterbirdsociety.bsky.social · 06/06/2025
#Waterbirds in the news! @axios.com just featured Cimino et al.'s new study, "The First GPS Observation of a Western Gull Riding in a Long-Haul Garbage Transfer Truck" bioone.org/journals/wat... ttps://www.axios.com/local/san-francisco/2025/06/04/hitchhiking-seagulls-san-francisco-climate-change
axios.com
This seagull took an 80-mile truck ride twice to find food
Researchers say it's the first recorded case of a seagull using a vehicle for transport while foraging.
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Ed Kroc @edkroc.bsky.social · 28/05/2025
I endorse this post 100%. "Automatic inference" is mostly an abomination. I have zero tolerance for it in ecology.
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UKCEHseabirds @ukcehseabirds.bsky.social · 22/05/2025
Finally the first Kittiwake egg! Three days later than last year and ten days later than average. Only five later dates. Due to birds being in poor condition or the dry conditions making nest building difficult? Maybe time will tell
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Ed Kroc @edkroc.bsky.social · 08/05/2025
This is the way. Larus michahellis in omnibus.
youtu.be
Baby seagull lands moments before white smoke signals new pope
YouTube video by FOX 13 Seattle
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Ed Kroc @edkroc.bsky.social · 07/05/2025
New RVVM blog up. Here I discuss a new paper that, among other things, uses RVVMs to fix a common meta-analysis problem: incongruent categorization of a moderator across studies. 1/3 edkroc.wordpress.com/2025/05/06/r...
edkroc.wordpress.com
RVVM Blog 5: What’s My Age Again?
Blink-182 is one of those punk rock bands that: (1) everyone knows, (2) has some great songs, and yet, (3) overall, isn’t very good. Like NOFX or The Clash. Nevertheless, like those bands, th…
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NinaDehnhard.bsky.social @ninadehnhard.bsky.social · 05/05/2025
Counting kittiwakes in Rørvik with @bksandercock.bsky.social. #Fieldwork for @seapop.bsky.social has started. #seabird #research @ninanatureresearch.bsky.social
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Wetland Bird Survey (WeBS) | Goose & Swan Monitoring (GSMP) @webs-gsmp.bsky.social · 24/04/2025
The UK's oldest known Oystercatcher was discovered on The Wash, at 43 years old, a new British record! Read the article by @rspbscience.bsky.social below to find out more about the importance of ringing and conserving these vital habitats⬇️ www.rspb.org.uk/whats-happen... #Ornithology #UKBirding
rspb.org.uk
UK’s oldest known Oystercatchers discovered on England’s east coast wetlands
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British Antarctic Survey 🐧 @bas.ac.uk · 22/04/2025
Why is Antarctica so important? Antarctica might feel very remote - until you look at the planet from a different perspective. It's actually central to our world's ocean currents. 🎁 Check the alt text to dig into this diagram 🌊 This is from a new book by BAS' @oceanandice.bsky.social (et al.)
The image shows a map of the world's currents, but looking at a projection of the world from the bottom of the globe, with Antarctica at its centre. The diagram shows all of the world's currents cycling through major oceans, all linked together by a central circular current that goes around the outside of the Antarctic continent.

"The Southern Ocean around Antarctica is central to global ocean circulation. It enables connectivity across the whole planet by linking the Atlantic, Pacific and Indian Ocean basins, and is the key site where waters are returned to the surface from depth and then converted into new water masses. The clockwise circulation of waters around Antarctica is the Antarctic Circumpolar Current, the strongest ocean current system in the world."

(Figure 1.1 from "Antarctica and the Earth System", edited By Michael P. Meredith, Jess Melbourne-Thomas, Alberto C. Naveira Garabato, Marilyn Raphael)
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Louise Blight @louiseblight.bsky.social · 06/04/2025
Waiting for the fish market to open. Glaucous-winged Gull pair. #SuperSeabirdSunday #birds #gulls
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UKCEHseabirds @ukcehseabirds.bsky.social · 19/03/2025
The Isle of May breeding season is officially underway.We have our first shag on eggs!A clutch of three was seen putting first egg date back a week.This is the joint third earliest on record and 28 days earlier than the long term average (& 39 days earlier than last year).They have had a good winter
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Louise Blight @louiseblight.bsky.social · 10/03/2025
Adélie Penguins, Ross Island, Antarctica. #SuperSeabirdSunday #birds #seabirds
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Louise Blight @louiseblight.bsky.social · 06/03/2025
New study in today's issue of Science www.science.org/content/arti...
science.org
Butterfly populations are plummeting across the United States
Even common species have become much less abundant in just 20 years, a large analysis reveals
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British Ornithologists’ Union (BOU) @bou.org.uk · 07/03/2025
Spatial and temporal variation of beached birds in northern Argentine Patagonia | www.marineorn... | Marine Ornithology | #ornithology 🪶
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Alice Risely @alice-risely.bsky.social · 04/03/2025
We're getting some cracking photo submissions to the Gulls Eating Stuff project! Here are a few showing gulls predating a coot chick, a vole, a mole (!) and a GBBG that has just killed an adult moorhen. Keep 'em coming! Submit your photos of gulls eating stuff to citsci.org/projects/gul....
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BirdLife Malta @birdlifemalta.bsky.social · 03/03/2025
Seabird Team's Field Update Exciting news from last Friday's fieldwork! The first egg of the 2025 season has been discovered at the Yelkouan Shearwater colonies! A promising start for this year's breeding season. #SeabirdConservation #YelkouanShearwater #LifePanPuffinus #BirdLifeMalta
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Ed Kroc @edkroc.bsky.social · 01/03/2025
This is a landmark result: the Kakeya set conjecture proven in R^3. I just read Tao's summary of the preprint by Wang and Zahl and have a better handle on what's involved. Very promising for at least greatly improving lower bounds in higher R^n. Amazing work.
terrytao.wordpress.com
The three-dimensional Kakeya conjecture, after Wang and Zahl
There has been some spectacular progress in geometric measure theory: Hong Wang and Joshua Zahl have just released a preprint that resolves the three-dimensional case of the infamous Kakeya set con…
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Ed Kroc @edkroc.bsky.social · 21/02/2025
Measurement people, who/where has it been argued that predictive validity is the most important kind or only kind of validity that really matters?
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Louise Blight @louiseblight.bsky.social · 13/02/2025
Please follow and share this starter pack if you like and/or study gulls or skuas! 🪶 go.bsky.app/Vd8zWBU
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Ed Kroc @edkroc.bsky.social · 29/01/2025
Now this looks like an interesting paper.
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Ed Kroc @edkroc.bsky.social · 20/01/2025
Question: If you hear "HLM," does this automatically imply a compound symmetric covariance structure, or no? (I say "no.")
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Ed Kroc @edkroc.bsky.social · 14/01/2025
Got a call from a nice old lady today at my office. Wanted to know why "her seagull" gets all grey on his head in the winter (ans: they moult into winter plumage). She was so excited to learn that. Had been bonding with her gull for a decade. Great connection. Can't get that studying stats.
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British Ornithologists’ Union (BOU) @bou.org.uk · 13/01/2025
EARLY VIEW in IBIS Using model-based distance sampling to estimate decadal population change in Northern Gannets (Morus bassanus) across periods spanned by different at-sea survey methods | onlinelibrary.wiley.... T.J. Clark-Wolf et al | #ornithology #seabirds 🪶
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Ed Kroc @edkroc.bsky.social · 11/01/2025
#saturdaylaridae From July 2023, a Western Gull nest atop one of the many boats docked in Mission Bay, San Diego. Clearly, this boat hadn't been used by humans for awhile.
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Michelle Wille @duckswabber.bsky.social · 09/01/2025
HPAI has had significant impacts on UK birds w decreases in Great Skua, Northern Gannet, Sandwich Tern, Common Tern. For Great Skua, 73% decrease in occupied territories in 2023! 👉 www.tandfonline.com/doi/abs/10.1...
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Michelle Wille @duckswabber.bsky.social · 09/01/2025
Study of Northern Gannets in the N. Atlantic from 1900–2100, mostly with a focus on changing marine ecosystems. HPAI has had a notable impact on the population, causing a dramatic species level decline, which must be accounted for 👉 onlinelibrary.wiley.com/doi/full/10....
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Dr. Crystal A. Kolden @pyrogeog.bsky.social · 09/01/2025
Here's the reality about the #LAFires this week: this isn't the first time ANY of these places have burned. Not even close. In 2018, we mapped CA fire history to look at fire frequency across SoCal. Santa Monica Mtns area burns more than anywhere else -- up to once per decade in a given spot. 🧵
Map showing the number of times a location has burned in SoCal and which kind of fire it was: one burning under Santa Ana winds, or one that was a summer, fuel-driven fire without Santa Ana winds. Malibu area had burned at least 8 times from 1900-2017, and has burned twice now since. Image from Kolden and Abatzoglou (2018): https://www.mdpi.com/2571-6255/1/2/19
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Dr Sjúrður Hammer @sjurdur.bsky.social · 04/01/2025
Please follow and retweet this starterpack if you're mad about #seabirds 🐧🧪🌍 go.bsky.app/MPUTnm
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120 Minutes Daily @120minutes.bsky.social · 08/01/2025
Superdrag - "Destination Ursa Major" Video Airdate: October 6, 1996 youtu.be/IAYsXTnX4ck?...
youtu.be
Superdrag - Destination Ursa Major
YouTube video by .seams
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Ed Kroc @edkroc.bsky.social · 07/01/2025
Just rewatched Amadeus, for at least the 15th time probably. Just so good. The scene where Salieri helps a sick Mozart transcribe the Requiem Mass I think is still the best illustration I've seen of the difference between "great" and "genius."
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Sinead English @englishse.bsky.social · 06/01/2025
Exciting PhD opportunity with @neeltjeboogert.bsky.social , @padpadpadpad.bsky.social (Exeter) and myself (Bristol) on gulls, their microbiomes, and role in transmitting disease. Details below - deadline 13 January!
Poster of PhD advert about role gulls play in spreading disease and antimicrobial resistance. More info: https://www.findaphd.com/phds/project/what-role-do-gulls-play-in-spreading-disease-and-anti-microbial-resistance-nerc-gw4-dtp-phd-studentship-for-september-2025-entry-ref-5431/?p178297
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Louise Blight @louiseblight.bsky.social · 05/01/2025
Black-browed Albatrosses at a major colony in the Falkland Islands. #SuperSeabirdSunday #birds
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Ed Kroc @edkroc.bsky.social · 05/01/2025
#saturdaylaridae An interesting Western Gull nest in downtown Monterey, CA, from July 2023. It's on a narrow ledge above this second floor window above a downtown street. Such a small and precarious nest site is atypical of urban Westerns, much more typical of Glaucous-wingeds north in WA and BC.
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Ed Kroc @edkroc.bsky.social · 29/12/2024
#saturdaylaridae Goodbye 2024.
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Ed Kroc @edkroc.bsky.social · 18/12/2024
Writing a measurement error paper for a machine learning audience and just realized that the two domains use the term "calibration" to denote completely different things. Not great. Maybe I'll stick to biostats people.
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