Lesser Frigatebird

The lesser frigatebird is the smallest frigatebird, 66–81cm long with a wingspan of 155–193cm and a long, forked tail; males weigh 625–875g. It is a lightly built seabird with brownish-black plumage and long, narrow wings. The female is slightly larger and has a white breast and belly, and the male has a striking red gular sac that he inflates to attract a mate (Wikipedia, general species account).

It occurs over tropical and subtropical waters across the Indian and Pacific Oceans and off the Atlantic coast of Brazil, breeding on remote islands. Frigatebirds feed on fish taken in flight from the ocean surface, often flying fish, and sometimes harass other birds to force them to regurgitate food. They rarely swim and cannot walk, and the courtship display includes calls, bill rattling and spreading of the wings (Wikipedia, general species account).