Will Burrard-Lucas / Magnificent Frigatebirds (Fregata magnificens) silhouetted at dusk, Little Cayman Island, Cayman Islands.

Michele Westmorland / Magnificent Frigatebirds (Fregata magnificens) flying at dusk, Wolf Island, Galapagos Islands.

Doug Perrine / Magnificent frigatebirds (Fregata magnificens) fighting over a Spanish sardine (Sardinella aurita) off Yucatan Peninsula, Mexico, Caribbean Sea.

Tui De Roy / Magnificent Frigatebirds (Fregata magnificens) and Brown Pelicans (Pelecanus occidentalis) feeding on small schooling fish in the low tide shallows, Isabela Island, Galapagos Islands, Ecuador. Decembe...

Tui De Roy / Wenman Island (Wolf Island) fish eye view from summit of Outpost Island, remnant of volcanic caldera, hosting large colonies of Red-footed boobies and Greater frigatebirds, also home to Vampire finc...

Claudio Contreras / Californian sea lions (Zalophus californianus) in front of guano covered rocks with Magnificent Frigatebirds (Fregata magnificens). Espiritu Santo Island National Park, Sea of Cortez (Gulf of Californ...

Claudio Contreras / Californian sea lions (Zalophus californianus) in front of guano covered rocks with Magnificent Frigatebirds (Fregata magnificens). Espiritu Santo Island National Park, Sea of Cortez (Gulf of Californ...

Claudio Contreras / Californian sea lions (Zalophus californianus) in front of guano covered rocks with Magnificent Frigatebirds (Fregata magnificens). Espiritu Santo Island National Park, Sea of Cortez (Gulf of Californ...

Juan Carlos Munoz / Magnificent frigate bird (Fregata magnificens) in flight, Isla Holbox, Yucatan Peninsula, Mexico.

Mike Wilkes / Great Frigatebirds (Fregata minor) in flight silhouetted against sky. Genovesa, Galapagos Islands.

Mike Wilkes / Great Frigatebirds (Fregata minor) in flight silhouetted against blue sky. Genovesa, Galapagos Islands.

Yukihiro Fukuda / Lesser frigatebirds (Fregata ariel) brooding on nests on top of shrub, Christmas Island, Indian Ocean, July