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Gregory Kohn

@kohngregory

Professor specializing in bird social behavior. Interested in developmental systems thought, ontogenetic niches, organismal agency, and ייִדיש. PI: Animal Social Interaction lab, kohnlab.wordpress.com

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Latest posts by Gregory Kohn @kohngregory

Portrait of Bill Wimsatt

Portrait of Bill Wimsatt

I’m excited to finally announce a Festschrift SI at Acta Biotheoretica honoring the work of Bill Wimsatt with the SI’s first publication by @consume.red and @philosofir.bsky.social! The editors (@caitlinmace.bsky.social and I) are delighted! #philsci #hpbio link.springer.com/article/10.1...

02.03.2026 15:18 👍 30 🔁 18 💬 3 📌 1
A line graph showing NSF grant awards made through 2/27/26 for fiscal year 2026 compared with grant awards for fiscal years 2021-2025.

A line graph showing NSF grant awards made through 2/27/26 for fiscal year 2026 compared with grant awards for fiscal years 2021-2025.

NSF Update (Awards through 2/27/26)

Directorates to follow

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01.03.2026 14:48 👍 666 🔁 444 💬 28 📌 118

A psych student once asked me if ducks were birds.

25.02.2026 02:05 👍 3 🔁 0 💬 0 📌 0
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Comment on “Number-space mapping in the newborn chick resembles humans’ mental number line” Rugani et al. (Reports, 30 January 2015, p. 534) presented evidence that domestic chicks employ a “mental number line.” I argue that the hypothesis testing used to support this claim unjustifiably ass...

I think the jury is still out on this. These forced-choice binary tests in chicks can sometimes overestimate effects. See this commentary on another study that employed similar methods. www.science.org/doi/full/10....

21.02.2026 00:15 👍 4 🔁 0 💬 0 📌 0
Scaly breasted munia in flight carrying nesting material (grass)

Scaly breasted munia in flight carrying nesting material (grass)

Be it native or non-native like this Scaly-breasted Munia

Birds don’t ignore their base calling. Spring — a time to come together, sing, and make babies

I don’t see birds putting other birds in detention centers, defining borders or grifting the earth of its natural resources

It’s just love…

📷🌿🪶

20.02.2026 18:37 👍 123 🔁 20 💬 3 📌 0
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The social origins of vocal sequences in songbirds and human infants Abstract. From birdsong to human language, acoustic communication by vocal learners involves the concatenation of sounds into sequences. Sequences are more

Wonderful new paper from @mikehgoldstein.bsky.social 's lab! royalsocietypublishing.org/rstb/article...

18.02.2026 18:36 👍 13 🔁 4 💬 0 📌 0

Really interesting study!

16.02.2026 17:35 👍 1 🔁 0 💬 1 📌 0

A great write up of our recent paper funded by NSERC and the Smithsonian Institution that concluded that the extinct Apteribis of Hawaii might have been nocturnal.
#birds 🪶🧠🧪

done in collaboration with @weisbeckerbblab.bsky.social

11.02.2026 18:56 👍 24 🔁 5 💬 1 📌 0

The Edge’s culture was centered on elitism. The “third culture” promulgated by Brockman split science between great idea generators (mostly white men) and menial data collectors. This is pure idealism, and misinformation that science was just great ideas rather than the messy reality of research.

05.02.2026 13:28 👍 13 🔁 5 💬 1 📌 0

There is an account on VK that keeps trying to post an inventory of the Russian military from the inside, they keep getting shut down though. I can see if I can grab it next time it pops up.

04.02.2026 16:21 👍 9 🔁 1 💬 1 📌 0
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Sifting through Animal Behavior Society newsletters and came across a castigation of the field made by Dutch ethologist Adriaan Kortlandt in 1990. He states, "Ethology is supposed to be the study of behaviour, but the behaviour has become invisible." He also used to fight goats during lectures.

04.02.2026 01:08 👍 18 🔁 9 💬 0 📌 0
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Radical Yiddish Song For This Moment: Anti-Authoritarian Yiddish Sing Along with DJ Chaia — The Workers Circle Want to learn about revolutionary Yiddish music? Join DJ Chaia and Daniel Carkner for a sing-along meets historical adventure.

Curious about revolutionary #Yiddish music? Join DJ Chaia and Daniel Carkner online for a sing-along and a historical adventure tomorrow, February 3 at 7:00 PM ET. Explore five early 20th century Yiddish songs sung by #Jewish radicals as they fought tyrants and challenged #Zionism: shorturl.at/8gUVM

02.02.2026 15:20 👍 3 🔁 1 💬 0 📌 0
In the foreground, a young American Herring Gull with a drab, worn, brown, "predefinitive" plumage. This bird is probably ~12 months old. Behind, an older, breeding adult in a "definitive" gray and white plumage, which is probably 4 or more years old. We have little information about the ecology and evolution of delayed plumage maturation in seabirds.

In the foreground, a young American Herring Gull with a drab, worn, brown, "predefinitive" plumage. This bird is probably ~12 months old. Behind, an older, breeding adult in a "definitive" gray and white plumage, which is probably 4 or more years old. We have little information about the ecology and evolution of delayed plumage maturation in seabirds.

A breeding gull attacks a plastic model as part of behavioral experiments at the breeding colony on Kent Island, New Brunswick, Canada.

A breeding gull attacks a plastic model as part of behavioral experiments at the breeding colony on Kent Island, New Brunswick, Canada.

Coco and Tracey Faber start painting raw plastic models for stimulus experiments, using photo references and museum specimens at the Yale Peabody Museum of Natural History.

Coco and Tracey Faber start painting raw plastic models for stimulus experiments, using photo references and museum specimens at the Yale Peabody Museum of Natural History.

Excited that our paper is headed for publication at Animal Behaviour! - "Experimental study of social signaling through delayed plumage maturation in a colony-nesting seabird."

Our experiments show how the unusual, brown plumages of young seabirds can help reduce aggression at the breeding colony.

02.02.2026 22:13 👍 16 🔁 4 💬 1 📌 1
Cover of book Macroevolutionaries by Bruce Lieberman and Niles Eldredge.

Cover of book Macroevolutionaries by Bruce Lieberman and Niles Eldredge.

Back cover of book Macroevolutionaries by Bruce Lieberman and Niles Eldredge.

Back cover of book Macroevolutionaries by Bruce Lieberman and Niles Eldredge.

Finished my first book of 2026, Macroevolutionaries by @bruceslieberman.bsky.social and @nilese.bsky.social. It’s a wonderful tribute to Gould, every essay is enlightening, but the one on Kestrels is my favorite.

02.02.2026 13:13 👍 16 🔁 4 💬 2 📌 0
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Far-reaching consequences of trait preferences for animal social network structure and function Animals living in social groups often preferentially socialize with others that have specific characteristics, such as large body size or a specific sex. U

academic.oup.com/beheco/artic...

31.01.2026 00:25 👍 1 🔁 0 💬 0 📌 0
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Neophenogenesis and Evolutionary Psychology Note: This is an archived blog post from 2020 on another site.

Sure. But this maintains that universality, heuristic value, and function have theoretical status since they can only be explained via directional selection. I don't think the evolutionary or developmental sciences consider that a reasonable position anymore. gregorykohn.substack.com/p/neophenoge...

30.01.2026 23:59 👍 0 🔁 0 💬 0 📌 0

I feel like Will’s paper does not convincingly make the case that said hypotheses are drawn from rigorous approaches to evolutionary or developmental science. Leaning on falsifiability to mask this isn’t compelling. I recommend David Moores response to this paper. psycnet.apa.org/fulltext/202...

30.01.2026 21:55 👍 3 🔁 1 💬 1 📌 0

This is a personal affront

29.01.2026 19:01 👍 21 🔁 3 💬 0 📌 0

I don't think it would be beyond the pale to say that almost every biological process (including those outside of genetic constraints) during early development plays a key role in zygote activation.

29.01.2026 14:30 👍 2 🔁 0 💬 0 📌 0
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An Evolutionary Story of Agency This open access book exposes the role of agency in the history of life. Agency is understood as the capacity of an organism to act, make decisions, ...

Interesting new book on the evolution of agency by Álvaro Moreno and Juli Peretó. I've only read the first few chapters, but I am already hooked! link.springer.com/book/10.1007...

29.01.2026 01:23 👍 29 🔁 11 💬 1 📌 1
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Rearing group size in young ravens: stress load or social opportunity? Abstract. Understanding how variations in early social environments generate different experiences for offspring (affecting their behaviour and the way oth

How family size influences the early life experiences of young ravens. royalsocietypublishing.org/rsos/article...

29.01.2026 01:17 👍 5 🔁 0 💬 0 📌 0
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Phylogenetic relationships within the genus Garrulus Brisson, 1760 (Corvidae, Aves) with special emphasis on the Garrulus glandarius complex based on mitochondrial marker sequences Among the three forest-dwelling species of the avian genus Garrulus Brisson, 1760, the Eurasian Jay Garrulus glandarius (Linnaeus, 1758) is most widespread. It exhibits a complex geographic pattern of...

Phylogenetic relationships of the Garrulus jays. anhmw.pensoft.net/article/1687...

29.01.2026 01:14 👍 2 🔁 1 💬 0 📌 0
Picture of an American Crow, a large black bird, making a vocalization.

Picture of an American Crow, a large black bird, making a vocalization.

28.01.2026 02:32 👍 3 🔁 0 💬 0 📌 0
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Closing the loop: how semantic closure enables open-ended evolution? Abstract. This study explores the evolutionary emergence of semantic closure—the self-referential mechanism through which symbols actively construct and in

Happy to share my new paper w/ @cgershen.bsky.social, just published at @royalsocietypublishing.org Interface!

Open Access🔓: royalsocietypublishing.org/rsif/article...

Instead of proposing a new theory, we offer a synthesis in theoretical biology. Want to know more? Read the full thread./1 👇🧵

22.12.2025 15:18 👍 25 🔁 12 💬 1 📌 0
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Friends, I’m once again asking you to donate. But not to me!

@claireforny.bsky.social is a union organizer, democratic socialist and my former Assembly colleague running for Congress in NY-7.

Chip in today: secure.actblue.com/donate/clair...

27.01.2026 14:26 👍 3686 🔁 685 💬 59 📌 57
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Genetic Data From Over 20,000 U.S. Children Misused for ‘Race Science’

Great piece in the NYtimes with quotes from @stairwaytokevin.bsky.social and @sashagusevposts.bsky.social. The misuse of NIH datasets with sensitive personal information for racist aims should be concerning for anybody interested in scientific integrity. www.nytimes.com/2026/01/24/u...

24.01.2026 14:50 👍 21 🔁 13 💬 0 📌 0
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Surrounded and Abandoned, Rojava Faces Slaughter - Truthdig The U.S. ends its decade-old relationship with Syria’s secular, feminist, Kurdish forces, leaving them to again face an Islamist assault.

www.truthdig.com/articles/sur...

24.01.2026 13:16 👍 0 🔁 0 💬 0 📌 0
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Have you ever wondered how animals were using affective states to cope with our activities?

Here's our NEW PAPER (and my first) that tells you everything you need to know and how much should we feel concerned by the consequences of our activities besjournals.onlinelibrary.wiley.com/doi/10.1111/...

21.01.2026 11:15 👍 12 🔁 5 💬 1 📌 0
This line graph illustrates the percentage change in agency staff levels from the previous year for nine major U.S. federal scientific and health organizations between the fiscal years 2016 and 2025. The agencies tracked include the CDC, Department of Energy, EPA, FDA, NASA, NIH, NIST, NOAA, and NSF. For the majority of the timeline between 2016 and 2023, the agencies show relatively stable fluctuations, generally staying within a range of +5% to -5% change per year. However, there is a dramatic and uniform plummet starting in the 2024–25 period. Every agency depicted shows a sharp downward trajectory, with staffing losses ranging from approximately -15% to over -25%. The Environmental Protection Agency (EPA) shows the most significant decline, dropping to roughly -26%, while the National Institute of Standards and Technology (NIST) shows the least severe but still substantial drop at approximately -15%.

This line graph illustrates the percentage change in agency staff levels from the previous year for nine major U.S. federal scientific and health organizations between the fiscal years 2016 and 2025. The agencies tracked include the CDC, Department of Energy, EPA, FDA, NASA, NIH, NIST, NOAA, and NSF. For the majority of the timeline between 2016 and 2023, the agencies show relatively stable fluctuations, generally staying within a range of +5% to -5% change per year. However, there is a dramatic and uniform plummet starting in the 2024–25 period. Every agency depicted shows a sharp downward trajectory, with staffing losses ranging from approximately -15% to over -25%. The Environmental Protection Agency (EPA) shows the most significant decline, dropping to roughly -26%, while the National Institute of Standards and Technology (NIST) shows the least severe but still substantial drop at approximately -15%.

This is the most astonishing graph of what the Trump regime has done to US science. They have destroyed the federal science workforce across the board. The negative impacts on Americans will be felt for generations, and the US might never be the same again.

www.nature.com/immersive/d4...

20.01.2026 22:53 👍 14450 🔁 8316 💬 90 📌 765
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Tricolored heron (Egretta tricolor)

20.01.2026 00:32 👍 14 🔁 4 💬 0 📌 0