Although I think this is pretty good, it took me almost 500 shots to get it.
I learned that when the chick opens it's mouth, your camera better be ready cause the action happens fast, and doesn't last long.
I changed the angle a few times for a better background, and a better view of the adult coming in.
I changed shutter speed, 1/640 wasn't even close to stopping the action.
I would have liked to have lower iso, but you can't control everything.