Gregory Kohn

@kohngregory.bsky.social

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

Donald Griffin, discoverer of bat echolocation, was born OTD 1915. I imagine “small mammals enough like ourselves to feel that I could understand what their lives would be like, and yet different enough to make it a sort of adventure and exploration to see what they were doing.” 🐋🌱🧪 #HistSTM

Fig. 11 from Griffin, Echoes of Bats and Men (1959). “The frequency and wave length of a bat's sound vary during each chirp. This diagram, which is approximately to scale, illustrates the small amount of sound reflected by one insect.”I

Happy to share this 'capstone' project from my time as a postdoc @umich.edu, where we show that hierarchically nested bursts of body-shape evolution may underlie much of perching-bird diversification over ~50 million years. Free access link here: rdcu.be/fuxB1

Rates of passerine body plan evolution in time and space

Nature Ecology & Evolution - A reconstruction of the evolutionary history of passerine body plans over the past ~50 Myr shows rare bursts of phenotypic innovation near the origin of major...

rdcu.be

very nice read! I've been thinking about innovation vs. copying a lot lately - motivated by my finding that increasing learning rates in zebra finches led to learning novel syllable variants. And listening to the catbirds in my yard makes me wish I could get them into the lab eh:

Song development by grey catbirds

What are the relative roles of imitation, improvisation and invention in the development of large song repertoires in species of the songbird family M…

sciencedirect.com

A thorough documenting of the statistical shenanigans in the embryo selection company Herasight’s claims about genetic IQ prediction. The paper was published in a new Intelligence journal against the reviewers’ protest that the proprietary prediction model was not disclosed and so was unverifiable

Herasight: Latent Promises, Observed Failures

Many make the mistake of rejecting Herasight on ethical grounds, but doing so gives them too much credit.

open.substack.com

I’m pretty sure this is the first time bird conservation sparks a national revolution, and I’m looking forward to the ruling Lëvizja Bashkë-Birdlife Albania coalition. I birdied in Vjosë–Nartë around 08ish, and you’d have to be crazy to build a trashy resort there.

Mother Jones@motherjones.com · last mo.

The “Flamingo Revolution,” as local activists have dubbed it, was set off by the luxury resort projects that Donald Trump’s daughter, Ivanka, and her husband, Jared Kushner, plan to build on nature reserves in Albania.

Really interesting book that covers Lefebvre’s studies on avian innovation and behavioral flexibility. How this relates to “general intelligence” is an open conceptual question for me, but the studies here really speak to the potential of behavioral drive in avian evolution.

BildBild

tl;dr: There never was a paradox of the organism. It was just a mistake about genes. But genetic conflicts do occur and are fascinating. This is also an invitation: if you like the selfish-gene idea, I'd love to hear why. What biological reality does the metaphor capture?

Philip Ball@philipcball.bsky.social · 2mo ago

I have read and enjoyed The Paradox of the Organism by @arvidagren.bsky.social and Manus Patten. I had a lot of thoughts about it, and about selfish genes. Here they are, in a long blog post. homunculusmusic.wordpress.com/2026/05/30/i...