Abstract Background The origin of powered avian flight was a locomotor innovation that expanded the ecological potential of maniraptoran dinosaurs. leading to remarkable variation in modern birds (Neornithes). The avian sternum is the anchor for the major flight muscles and. despite varying widely in morphology. https://www.bekindtopets.com/hot-sale-Oreiller-de-voiture-ISIDOR-Chantilly-top-super/