# Crows process visual motion decisions twice as fast as primates despite lacking a mammalian neocortex

Tübingen neurobiology study reveals avian brains resolve random-dot motion tasks using identical mathematical decision logic at double primate speeds.

- Canonical: https://reviewblip.com/news/crows-process-visual-motion-decisions-twice-as-fast-as-primates-despite-lacking-a-mammalian-neocortex/
- Published: 2026-10-27T04:13:58.402Z
- Updated: 2026-10-27T04:13:58.402Z
- Author: ReviewBlip
- Category: Cognitive Computing & Neuromorphic Vision
- Type: News

![Carrion crow perched beside an interactive cognitive testing screen displaying random-dot visual stimuli](https://reviewblip.com/editorial-images/c7f2afaf42500f45f6a98ab02f9a1066d527fc76039bd33abbea39daaf31ac4b)

Image credit: Ars Technica / Getty Images

In a landmark neurobiology study published in Current Biology, researchers at the University of Tübingen have revealed that carrion crows analyze complex visual motion and execute perceptual decisions more than twice as fast as primates. The findings challenge long-standing assumptions in computational neuroscience regarding the necessity of the mammalian neocortex for rapid, high-order visual reasoning.

Neurobiologists Andreas Nieder and Philipp Schmidbauer evaluated hand-raised crows using an identical experimental protocol historically administered to rhesus macaques: a random-dot motion direction task displayed on touch-sensitive screens. The birds were required to evaluate the coherent drift direction of drifting white dots against visual noise and report their choice by pecking directional flanking targets, earning mealworm rewards for correct classifications.

Simultaneous microelectrode recordings from the crows' endbrain—specifically the nidopallium—revealed that avian neurons accumulate visual evidence using the exact same mathematical drift-diffusion algorithms found in primate parietal and frontal cortices. However, the crows reached decision thresholds in under 250 milliseconds, outperforming primate reaction times while maintaining statistically equivalent perceptual accuracy across varying signal-to-noise ratios.

The architectural divergence between avian and mammalian endbrains offers critical insights for artificial intelligence engineers. While primate brains rely on six-layered, columnar neocortical circuits with extensive white-matter wiring, avian brains achieve superior processing velocity through hyper-dense, non-laminated nuclear clustering. The discovery provides a biological blueprint for low-power neuromorphic vision processors, demonstrating that compact, non-hierarchical neural topologies can outperform conventional multi-layer architectures in real-time edge computing.

## Sources
- [\[src-arstechnica-crows-visual\] Crows can evaluate visual info twice as fast as mammals](https://arstechnica.com/science/2026/10/crows-can-evaluate-visual-info-twice-as-fast-as-mammals/)