They are about 2/3rds the size of an Eagle. There are a lot of them in my area. They are easy to identify when soaring. They hold their wings in a V shaped angle and rock slowly from side to side while soaring. They are powerful flyers when they have to be, as mentioned above. The only large bird that rocks side to side while soaring. Seen up close they are really plug ugly! I knew a guy who hit one with his car. It crashed through the wind shield and landed in the back seat of his car and puked all over it. He never really got the stink out. We call them Buzzards but they are properly Vultures. In Europe a Buzzard is a Buteo, the same family which our Red-tail Hawks, Red-shoulders, Broadwings, Swainson's etc. belong to.
Cordially,
Bob