If a ball hits something in the air (e.g. helicam or any bird) and is then caught, will the batsman be given out?
In short for hitting a bird it would be considered out as under law 23 the ball would not be dead.
With regards helicam that is a little more tricky. I am trying to look for the regulations regarding its use. I suspect it would be a dead ball, but under simple law it would also be out.
I think this happened once in the IPL. The ball hit the helicam and went for a four, and the batsman was given four runs. It should have been a dead ball but the umpire gave him a bit of a leeway there.