black vultures

I consulted my National Audubon field guide to north american birds and am fairly certain that what i saw were two black vultures. They have a greyish head as opposed to red heads of turkey vultures. They're more aggressive than turkey vultures, like to fly high when the winds are up, which they were this weekend. Hope they took off for other parts - wouldn't want to see our rabbits, etc picked up. I know I wasn't too happy about them flying around when my lil grandson was out!