thanks but i fixed it a long time ago.Dart Traps have a cooldown of around three seconds, I timed it and you are in fact summoning birds too fast for this cooldown. I would recommend using bubble blocks to block off some lava for the birds to enter instead of using a dart trap to kill them, as the birds can pass through the bubble block and kill themselves on the lava. Also, use 3 second or 5 second timers instead of a manual switch if you still find you're summoning the birds too fast for your dart traps.