The Crows

The Crows in Earth Taken seem to be the only Earth creatures that can breathe the poisoned air, making them a key factor in Dr. Heinrich's research to cure the poisoned air.

The Crows can be shot and killed in the game and one shot from any weapon will kill one.

They are seen feeding on human corpses, perching on trees and other high places, and also sometimes they are even seen flying without you scaring them.

It is currently unknown why the Crows can breathe in Earth's poisoned air, and they are not attacked by Aliens or other hostiles unless they are aiming at you when you are right in front of a Crow, which is unlikely but can happen.