Black-crown Night Heron Pond Heron in Flight Flock of Black-headed Ibis in flight. Prey catching by Egrets, a small fish can be seen inside the beak of the egret
Sometimes funny though, birds do scratch their bodies a lot. Mostly it is because of many ectoparasites. They also clean their bodies by either taking mud bath or preening their feathers. Picture below show two species, 1. Great Egret, and 2. Black-headed Ibis scratching their head.