A group of male frigate birds with red throat pouches oversees females with chicks to prevent attack by predators, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

The male frigate with red throat pouch, which it inflates as part of its courtship behaviour, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

Magnificent fregate bird (Fregata magnificens) sitting on brushwood and mating with bloated throat pouch, Genovesa Island, Tower Island, Galápagos Archipelago, Ecuador, South America

Great Frigatebird (Fregata minor), male, with inflated throat pouch, portrait, Genovesa Island, Galapagos, Ecuador, South America

Galapagos Islands, Closeup of male great frigatebird (Fregata minor palmerstoni) with throat pouch inflated in grass.

Magnificent Frigatebird Fregata magnificens male with inflated red gular pouch during the mating season on North Seymour Island, Galapagos Islands, Ecuador

Galapagos Frigatebird, Magnificent Fregata magnificens/inflated throat, Galapagos Islands, Ecuador