Bird Brain? It May Be A Compliment!
Chickens, supposedly the ultimate “bird brains,” give a different warning cry when they spot a predator overhead or on the ground—and they only give a cry when other chickens are present. This surprises many scientists, who have long assumed that the human and mammal neocortex is essential for complex cognitive processes. Now that idea is being challenged, write the authors, by research showing the surprising capabilities of some tiny brains.