Hang Gliders can't flap their "wings" either. Perhaps it was a bad analogy. But then again so was his equating it to albatrosses. Is it possible that the wing folds at different angles to allow a more rapid upbeat in the wing stroke? Did he model from fossil remains? My opinion is that he saw the Discovery channel episode that saw them fishing in the open ocean and came to some poor conclusions or simply needed to have some justification for tormenting those poor albatross.