H. J. Williams, E. L. C. Shepard, Mark D. Holton, P. A. E. Alarcón, R. P. Wilson, S. A. Lambertucci Proceedings of the National Academy of Sciences of the United ...

Soaring birds — like osprey, eagles, falcons, even vultures — can stay aloft in the air seemingly forever, rarely flapping their wings. They glide along rising air currents in a way that has ...

(CN) — In a new study, researchers say soaring birds like eagles, vultures and falcons that can glide effortlessly by flapping their wings only occasionally have evolved to use their lungs to aid in ...

Scientists have compared the relationship among the strength of flight bones, body mass, and the way modern birds fly to better understand the evolution of flight in birds and extinct animals, such as ...

An air-filled sac within the birds' lungs is believed to increase the force the birds use to power flight muscles while soaring. Soaring birds -- like osprey, eagles, falcons, even vultures -- can ...