Footage of crow intelligence is making people rethink 'bird brain'

A new study finds crows can recognize geometric shapes

They know your face. And if you wrong them, they remember. Crows can recognize individual humans, even in a crowd. They tag us as helpful or harmful and act on it. A person who trapped a crow once can get mobbed years later. The birds call out and recruit others to join. Here’s the wild part. That reputation spreads. Young crows learn who to avoid by watching adults. The warning can ripple through a whole neighborhood. Scientists tested this with simple masks. One mask meant danger, the other me