New study finds birds of prey use unique air sac to soar to great distances
Unlike the lungs of mammals, bird lungs do more than just breathe. An air-filled sac within the birds’ lungs is thought to increase the force the birds use to power flight muscles while soaring.
A Bald Eagle soars over the Hudson River off Nyack, New York, U.S., May 11, 2024. (photo credit: MIKE SEGAR / REUTERS)ByJUDY SIEGEL-ITZKOVICHUpdated: