Back in the days of youth and stupidity while living in Florida, we used to chase the buzzards and hawks - get close enough and they would break from thermaling and actually flap their wings. On a couple of occasions they would turn and chase us. In a full power dive with a Sig Kavalier they would still catch the plane and the only way to evade them was to pull a tight loop when they got on the tail.

On the other hand, with gliders we could share the same thermals and it didn't phase them. Go figure.....

Hogflyer