Just wanted to put my two cents in about black vultures: they absolutely can and will stalk and kill live, full grown chickens. I've lost more chickens to black vultures than anything else in the year we've now lived on our farm.
I was stumped about what killed the first few chickens I lost-- then I caught a black vulture in the act. It had one of my Marans hens pinned down and was ripping her neck feathers out. It flew off as soon as I went outside. (She survived, thankfully. I must've caught the vulture seconds after it caught her.)
Black vultures will stalk my free ranging flock even in the height of deer roadkill season. They're aggressive and persistent, and so far the only way I've found to effectively deal with them is a very loud shotgun and two smart, watchful roosters. (No, I don't kill black vultures, but sure do make as much noise as I can.) I've tried other stuff--fake owls, hanging CDs, etc-- and nothing else has worked.
So to those who say black vultures won't kill live prey: come on down to NC and I'll prove you wrong.![]()
That's interesting. Never would have thought of them.