“Monsters of the Mesozoic Skies,” Michael B. Habib's article on pterosaurs, gives the best discussion of their likely flight mechanisms I have ever read! Some birds with large heads and bills, such as pelicans, fly with their neck retracted over their back so that the weight of the head and bill are close to the shoulders (and thus the center of lift). Would such a posture be a way for pterosaurs to maintain better balance during flight?