tranquil arch
I think there is a defect in the rework that was done some time ago on waterfowl and that is that not all ducks fly at the same height above ground level and that is that the mallard and the wigeon fly at the same height as the geese, that is, 80 meters above the ground when in reality they should fly at 40 meters above the ground like the common teal, the tufted duck, etc.
