Tui De Roy / Great frigatebird (Fregata minor) male guarding single chick. Punta Cevallos, Espanola Island, Galapagos, Ecuador, May.

Tui De Roy / Great frigatebird (Fregata minor) male taking flight at dusk. Espanola Island, Galapagos, Ecuador, May.

Tui De Roy / Magnificent frigatebirds (Fregata magnificens) in low flight ovehead. Espanola Island, Galapagos, Ecuador, December.

Cheryl-Samantha Owen / Great frigate birds (Fregata minor) sitting in tree, Aldabra Atoll, Seychelles, Indian Ocean

Ole Jorgen Liodden / Magnificent Frigatebird (Fregata magnificens) male displaying, red throat pouch inflated. Galapagos

Ole Jorgen Liodden / Magnificent Frigatebird (Fregata magnificens)displaying in flight, red pouch inflated. Galapagos

Kevin Schafer / Ascension frigatebird (Fregata aquila) male soaring high, Ascension island, Atlantic Ocean, Vulnerable species

Kevin Schafer / Ascension frigatebird (Fregata aquila) flock soaring high, Ascension island, Atlantic Ocean, Vulnerable species

Tui De Roy / Great Frigatebird (Fregata minor) female guarding chick, Galapagos Islands, Ecuador

Gerrit Vyn / Adult male Magnificent Frigatebird (Fregata magnificens) displaying. Dry Tortugas NP, Florida, USA

Patrick Morris / Magnificent frigate bird {Frigata magnificens} pair on nest, male displaying with red throat pouch inflated, Genovesa Is, Galapagos

Pete Oxford / Great frigate bird (Fregata minor) female on nest with chick, Galapagos