Vulture

Vultures are scavenging birds of prey that live off the carrion of other dead animals.

Background
Vultures survived the Great War and its many nuclear blasts, and can be seen flying above most settlements in the Capital Wasteland, such as Megaton, Temple of the Union, and Evergreen Mills. The birds are also seen flying above and perching around the Mojave Wasteland. A deceased vulture can be found in Appalachia.

Fallout 3 and Fallout: New Vegas
Vultures circle around certain areas that contain some degree of notability, such as Megaton, Old Olney, and the alien crash site.

Fallout 76
The body of a large, mutated vulture can be found pinned to Seneca Rocks.