This is an interesting one. The object's motion is not that of something using the air for lift. News camera from another world?
At first I thought this was a bird, with some of it's movement being distorted by the curvature of the helicopter's window, but the lurching effect should have been backward in that case, not forward as it is.
Then it occurred to me: this thing seems to be jumping from one debris chunk to another... is it a panicked cat?