most likely either a head shot or a lung shot, seen it before.I had one last year that I shot it, never saw a feather come off, never saw a change in flight pattern, and it kept flying higher and higher - I swear it was 100 yards in the air and flying off into the distance, a sure miss. Then all of a sudden like a helicopter that just had it's motor die, it fell straight down out of the air. Found it laying dead right where it went down, maybe 150 yards ahead.