Frigatebird on Laysan Island

large bird, with long, slender wings, deeply forked, tail and long, pale blue and grey to blackish hooked bill. Adults have mostly black plumage. Adult males have a red inflatable throat pouch and their legs and feet are red to reddish-brown. Females have white breasts and on average are larger than males. The female's legs and feet are pink to reddish-pink. Juveniles have rusty to white heads and throats. Great frigatebirds nest and range widely within tropical Indian and Pacific Oceans. Magnificent Frigatebird on Nihoa Island.