What Lab Princess posted is pretty much what I found in my search. There is no official buzzard in the USA. Many bird people call hawks and such buzzards although it is kind of a slang term.
The video was interesting. I agree mostly with what she is saying about the hawk. The problem is that she is speaking about how hawks and owls act in their normal setting and assuming there is plenty of food sources for them to eat. They do kill on the ground and they can easily pick apart a body and take the best parts with them. I have seen some very nervy owls and hawks. But I have also seen smaller birds gang up on huge hawks and chase them out of the area. That happens often during nesting season. Birds form groups to chase off predators.
Right now there are a lot of young adult owls and hawks looking for their own hunting areas. They are not as skilled at hunting as a more mature bird. They can get pretty hungry so they will pick some crazy targets. Did you see the size of the feet and talons on that hawk?
