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 ...

A few weeks ago I wrote about swallows and how much fun they are to watch as they swoop and turn. And, I repeat: If I could fly like a bird that is how I would want to fly. However, soaring comes in ...

A frigate in flight. Some of the juveniles in the study stayed continuously aloft for more than two months. How do frigate birds—seabirds with a 7-foot wingspan—stay aloft for months at a time? Their ...

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 ...