Hawk

Hawks are birds found in Skyrim, being found anywhere with the exception of dungeons. The have very little health and drop Hawk Beaks and Hawk Feathers, both are alchemical ingredients. They are seen flying around skyrim (normally by nests), and are passive creatures which will not attack the player, even after being attacked, similar to that of the behavior of deer or goats. Hawks can be shot out of the sky by long range Destruction magic or with arrows from a bow.

Hawk Hunting is said by experienced marksmen to be one of the most difficult hunting sports in Skyrim. The large amount of hawks that can be seen circling above the Solitude docks make it a good spot for hawk hunters.

Additionally, if you manage to find a hawk's nest and wait a few moments near it, a hawk will land on it. If you manage to get atop the central rock stucture in Bloated Man's Grotto, you will find two nests on it giving you two easy kills which then dissapear.

Bugs:
Invincible hawks can often be found flying over Solitude. When shot with an arrow, the arrows will float a few feet away from the hawk and follow it. (Confirmed PS3)

Can be killed when shot with Pacify. (Xbox)