Felix W. Moll

@mollfw.bsky.social

Research Group Leader at the Institute of Neurobiology, University of Tübingen. Neuroscientist. Studies crows and modern dinosaur brains 🦖 --> 🐦‍⬛. Group website: felixmoll.com

🚨 New paper in @nature.com We asked why two hippocampal areas with very different anatomy, CA3 and CA1, often seem to code space so similarly? By recording bats flying up to 200m, we found that the difference was hidden by scale! www.nature.com/articles/s41... 🧵 1/11

Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1 - Nature

The hippocampus exhibits a CA3-to-CA1 coding transformation that combines fast learning with an efficient, compressed neural code.

nature.com

Where, exactly, does learning happen in the brain? Out today in @nature.com, we identify a synaptic locus of birdsong learning and show that the circuit can be tuned to make birds learn faster - but at a cost. Read on👇 #neuroskyence 🧪 #prattle 💬 #bioacoustics Shareable link: rdcu.be/fiyrS

A synaptic locus of song learning - Nature

Combining a computational framework and optogenetic and chemogenetic manipulations within and downstream of the cortico-basal ganglia circuit identifies the specific cortico-basal ganglia synapse...

nature.com

More control wires enable finer control. The Banerjee lab's findings on the neuroanatomical underpinnings of vocal dexterity neatly tie in with a recurring motif in brain evolution: pre-existing pathways can be selectively expanded to increase sensorimotor control and expand behavioral repertoires.

Cedric Boeckx@cedricboeckx.bsky.social · 3mo ago

“Specific expansion of motor cortical projections in a singing mouse” Great new work by @arkarupbanerjee.bsky.social E. Isco @cliffscience.bsky.social @xmikezheng20.bsky.social @tonyzador.bsky.social & colleagues on the neural basis of vocal dexterity, now out in @nature.com 🧪🧠

Striking results showing "swimming" brains in fish endocasts, demonstrating that endocasts are a poor predictor of brain morphology in ray-finned fish.

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Matt Friedman@friedmanlab.bsky.social · 3mo ago

Ray-finned fishes are famously diverse, but we know little about their brains or cranial endocasts. @rodrigoichthys.bsky.social opens this black box with a dice-CT survey of 86 species across the actinopt tree of life. #OA in @royalsocietypublishing.org 🐟🧠 royalsocietypublishing.org/rspb/article...

Figure of radial phylogeny featuring colored branches and tips representing brain-to-endocranial cavity correlation and endocast complexity. Select endocasts (rendered as semitransparent gray) and brains (rendered in peach) are shown for some terminals. They show substantial variation in shape and the degree of brain:endocast correspondence.

From Figueroa & Pierce (2026) Proc Biol Sci 293 (2070): 20253277 .
https://doi.org/10.1098/rspb.2025.3277

Shared under https://creativecommons.org/licenses/by/4.0/

Nice commentary on our recent paper on crow stick tool use. To add one piece of information: One of our crows did, in fact, sometimes use the substrate (i.e., the apparatus desk) to adjust its grip—the crow for which stick re-grasping by tossing was too subtle to be reliably detected.

Shoko Sugasawa@shokosugasawa.bsky.social · 8mo ago

New paper: Stick dexterity in carrion crows🥢 Commentary on Moll et al. 2025 in which they trained crows to use stick tools. Their neat set-up allowed tracking tool motions, showing that crows became more efficient over time. Could nest building affect their stick dexterity? Full text: rdcu.be/eSOMF

As a longtime fan of cool papers in @currentbiology.bsky.social, I am really thrilled to see this out! This study sets the stage for understanding the origins of novel (vocal) behaviors. Big shout out to the main architects of this work @xmikezheng20.bsky.social and @cliffscience.bsky.social

Cedric Boeckx@cedricboeckx.bsky.social · 9mo ago

Great @currentbiology.bsky.social study by @xmikezheng20.bsky.social @cliffscience.bsky.social @arkarupbanerjee.bsky.social 🧪🧠🐭🎶 Vocal repertoire expansion in singing mice by co-opting a conserved midbrain circuit node www.cell.com/current-biol...

Cool new paper on how neurons in my favorite bird's brain encode time. Congrats Millie and Max!! @milliejohnston.bsky.social , @crowbrain.bsky.social

Millie Johnston@milliejohnston.bsky.social · 11mo ago

I'm delighted to share that, together with @crowbrain.bsky.social our paper on time estimation in crows is now published in @natcomms.nature.com We found that crows not only keep track of time, but individual neurons prefer different time durations 🐦⏱️🧠 Check it out: www.nature.com/articles/s41...

Our paper on brain size evolution in birds of paradise was recently accepted! In brief: •BoPs have big brains, comparable to those of medium-sized corvids •Neither absolute nor relative brain size appears to have co-evolved with display complexity doi.org/10.1093/orni...

Did complex song and dance co-evolve with brain size in the birds-of-paradise (Aves: Paradisaeidae)?

Abstract. Complex signaling behaviors, such as avian song and courtship displays, have been associated with increases in both absolute and relative brain s

doi.org

My latest Aronov lab paper is now published @Nature! When a chickadee looks at a distant location, the same place cells activate as if it were actually there 👁️ The hippocampus encodes where the bird is looking, AND what it expects to see next -- enabling spatial reasoning from afar bit.ly/3HvWSum

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Our first look at midbrain PAG’s role in singing mouse vocal control. When near each other, these mice produce two divergent vocal modes. Same circuits for USVs and Songs—or different ones? Bets were made..some of us bought beers for others! Led by @xmikezheng20.bsky.social & Clifford Harpole. 👇🏽

animal prattle@animal-prattle.bsky.social · last yr.

Important new work from @xmikezheng20.bsky.social @arkarupbanerjee.bsky.social et al bit.ly/42dWcQN ethology+modeling+targeted neural manipulation —> new textbook example of how evolutionary tinkering can generate multiple behavioral modes with a single neural circuit #bioacoustics #prattle 💬

Proud to have contributed to @jiaxuanqi.bsky.social's masterpiece out @nature.com! She shows that dopamine transients track the learned quality of song during juvenile learning and that dopamine release is driven not just by VTA firing, but by a local cholinergic mechanism! (1/x)

Dual neuromodulatory dynamics underlie birdsong learning - Nature

Dopamine release in the basal ganglia of the zebra finch is driven by neurons associated with reinforcement learning and by cholinergic signalling, and tracks performance quality during long-term lear...

nature.com