Tony Wu / Sardines (Clupeidae) fleeing from predators in the early morning. They were being herded and chased by Trevallies and Blacktip reef sharks in the water, and picked off by brown boobies and terns from...

Tui De Roy / Red-footed booby (Sula sula), pair nest building in tree. Darwin Bay, Genovesa Island, Galapagos.

Tui De Roy / Nazca booby (Sula granti) in flight at dusk. Punta Suarez, Espanola Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), group of eight diving into sea to fish. Punta Gavilanes, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), group fishing underwater. Itabaca Channel, Santa Cruz Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) diving towards sea, folding wings. Northeast coast, Santiago Island, Galapagos. Sequence 1/2.

Tui De Roy / Blue-footed booby (Sula nebouxii) landing. Punta Vicente Roca, Isabela Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) coming in to land. Punta Vicente Roca, Isabela Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) perched on rock at coast. Santa Fe Island, Galapagos. August 2015.

Tui De Roy / Blue-footed booby (Sula nebouxii), pair in courtship display. Punta Pitt, San Cristobal Island, Galapagos. April 2017.

Tui De Roy / Blue-footed booby (Sula nebouxii), five diving into sea. Espumilla Beach, Santiago Island, Galapagos.

Ole Jorgen Liodden / Blue-footed booby (Sula nebouxii exisa) displaying, Galapagos Islands.

Ole Jorgen Liodden / Nazca booby (Sula granti) in flight with rainbow behind, Galapagos.

Tui De Roy / Nazca booby (Sula granti) portrait, Galapagos, Ecuador.

Tui De Roy / Blue-footed booby (Sula nebouxii) 'dancing' courtship display, Santa Cruz Island, Galapagos, Ecuador.

Michele Westmorland / Booby (Sula nebouxii) looking at camera underwater, Galapagos Island.

Tui De Roy / Nazca boobies (Sula granti) against dawn sky. Espanola Island, Galapagos, Ecuador, May.

Ole Jorgen Liodden / Blue-footed Booby (Sula nebouxii) performing courtship display. Galapagos

Ole Jorgen Liodden / Blue-footed Booby (Sula nebouxii) performing courtship display. Galapagos

Ingo Arndt / Brown Booby (Sula leucogaster plotus) head portrait, with wide bill open, Christmas Island, Indian Ocean, Australian Territory, November

Ingo Arndt / Red-footed Booby (Sula sula rubripes) in flight, returning to breeding colony after sunset, Christmas Island, Indian Ocean, Australian Territory, November.

Claudio Contreras / Male Brown booby (Sula leucogaster) in flight, Isabel Island National Park, Sea of Cortez (Gulf of California) Mexico, March

Juan Carlos Munoz / Blue footed booby {Sula nebouxii} diving, Galapagos, January

Juergen Freund / Brown boobies (Sula leucogaster) on beach, Tubbataha Reefs, Philippines

Patrick Morris / Pair of Nazca boobies {Sula dactylatra granti} Espanola Is, Galapagos

Solvin Zankl / Northern gannet (Morus bassanus) portrait, Bass Rock, Scotland UK

Tony Heald / Cape gannet {Sula / Morus capensis} coming in to land in colony, Lamberts bay, South Africa.

Nick Garbutt / Blue footed booby 'dancing' display (Sula nebouxii) Galapagos

Christophe Courteau / Blue footed booby displaying {Sula nebouxii} Galapagos.

Patricio Robles Gil / Australian gannet nesting colony {Morus / Sula serrator}. Muriwai, North Island, New Zealand.

TOM WALMSLEY / Cape gannet landing {Morus capensis} at nest colony on Bird island, Lamberts bay, South Africa

Georgette Douwma / Cape gannets courtship display {Morus capensis} Malgas Is, South Africa

Dave Watts / Australasian gannets in flight {Morus serrator} Australia.

Ingo Arndt / Blue footed booby with chick and egg at ground nest {Sula nebouxii} Seymour Is, Galapagos

Tony Heald / Cape gannets preening, courtship behaviour {Morus capensis} Lamberts Bay South Africa

Pete Oxford / Blue footed boobies plunge diving {Sula nebouxii} San Cristobal Is, Galapagos Islands

Staffan Widstrand / Two Blue footed boobies {Sula nebouxie} courtship display. Galapagos, Ecuador.

JIM CLARE / Guano unloading gantry with Peruvian boobies (Sula variegata). Chincha Island, Peru, South America

Pete Oxford / Peruvian booby nest colony (Sula variegata) Lobos de Afuera, Peru, South America

Warwick Sloss / Gannet with chick, Bass Rock, UK

Warwick Sloss / Gannet nesting colony, Bass Rock, UK

Tui De Roy / Blue-footed Booby (Sula nebouxii), Turtle Cove, Santa Cruz Island, Galapagos Islands, Ecuador

Patricio Robles Gil / Blue-footed Booby (Sula nebouxii) perched on rocks and cactus on San Pedro Martir Island, Gulf of California, Mexico

Tui De Roy / Nazca Booby (Sula granti) group on coast, Punta Suarez, Espanola Island, Galapagos Islands, Ecuador