Magnificent frigatebirds are almost silent seabirds found off the American and tropical coasts. These large birds make gliding and soaring look effortless as they use thermals to gain heights of up to 2,500 metres. The males gather during the breeding season and inflate red throat pouches like balloons to attract a mate. Magnificent frigatebirds were known as man-o'-war birds for their habit of catching and shaking other birds, then stealing the food the captive birds were forced to disgorge.

More...