Crow (Resident Evil)

Crows feature in the Resident Evil movies and video games. They are basically normal crows that became infected by a virus, and act hostile, and may infect others. If you don't disturb them, they usually just act content to feed on a carcass. However, in some triggered circumstances, they can come at you if you attempt to solve a puzzle and the solution is incorrect, or attack or startle them.

Trivia
In Resident Evil 4, they are no longer dangerous. They leave behind coins if you kill them.