I must be alone in really liking turkey vultures!
They take care of roadkill cleanup out here in the sticks where the county ignores us, and from all I've read about them, they are really neat birds, and not at all threatening to your chickens or other pets (unlike, as noted above, the black vulture). Poor things get a bad rap for being ugly when they really take care of a lot of nasty cleanup.
I get laughed at all the time because whenever I see them I get all excited and say things like 'oooh, vultures' the way someone else would coo at a kitten.