Pete Oxford / Nazca booby (formerly Masked booby) on nest with chick {Sula dactylatra granti} Tower / Genovesa Is, Galapagos

Pete Oxford / Nazca / Masked booby {Sula dactylatra granti} Tower / Genovesa Is, Galapagos

Pete Oxford / Nazca / Masked booby head portrait {Sula dactylatra granti} Tower / Genovesa Is, Galapagos

Pete Oxford / Nazca / Masked booby {Sula dactylatra granti} perching on stone looking backwards, Tower / Genovesa Island, Galapagos Islands.

Pete Oxford / Nazca booby (formerly Masked booby) (Sula granti) looking straight at camera, Española / Hood Island, Galapagos

Pete Oxford / Nazca booby (formerly Masked booby) (Sula dactylatra granti) Tower / Genovesa Island, Galapagos

Pete Oxford / Nazca booby (formerly Masked booby) (Sula granti) Española / Hood Island, Galapagos

Pete Oxford / Nazca booby (formerly Masked booby) (Sula dactylatra granti) Tower / Genovesa Island, Galapagos

Pete Oxford / Nazca boobies mating (formerly Masked booby) (Sula dactylatra granti) Tower / Genovesa Island, Galapagos

Pete Oxford / Masked Booby (Sula dactylatra) nesting colony observed by tourists from inflatable boat, Genovesa Island, Galapagos Islands, Ecuador

Pete Oxford / Masked Booby (Sula dactylatra) nesting colony observed by tourists from inflatable boat, Genovesa Island, Galapagos Islands, Ecuador

Bernard Castelein / Nazca / Masked booby (Sula dactylatra granti) in flight, Galapagos, Ecuador

Bernard Castelein / Pair of Nazca / Masked booby (Sula dactylatra granti) courtship behaviour, Galapagos, Ecuador

Doug Perrine / Masked booby {Sula dactylatra melanops} Flinders reef, Coral Sea, Australia

Doug Perrine / Masked booby {Sula dactylatra melanops} Flinders reef, Coral Sea, Australia

Doug Perrine / Masked booby {Sula dactylatra melanops} pair exchange gift of coral in courtship display, Flinders reef, Coral Sea, Australia

Tom Vezo / Masked Booby {Sula dactylatra melanops} on nest with egg, Hood Island, Galapagos.

Bernard Castelein / Masked booby (Sula dactylatra granti) standing on rock, Genovesa, Galapagos, Ecuador, South America, endemic subspecies

Pete Oxford / Masked booby (Sula dactylatra melanops) adult with newly emerged chick, Isla de la Plata, Pacific Ecuador, endemic to area

Tom Vezo / Masked booby (Sula dactylatra melanops) pair mutual grooming, Tower Island, Galapagos, Ecuador

Tom Vezo / Masked booby (Sula dactylatra melanops) calling, Tower Island, Galapagos, Ecuador

JIM CLARE / Masked booby {Sula dactylatra melanops} attacked by Vampire finch, Galapagos NP, Ecuador

Dave Watts / Masked Booby {Sula dactylatra melanops} female and large chick, Lord Howe Island, Australia

Todd Pusser / Masked booby {Sula dactylatra melanops} incubating eggs, Clipperton Island, Pacific

Todd Pusser / Masked booby {Sula dactylatra melanops} chick, Clipperton Island, Pacific.

Pete Oxford / Masked booby at sunset {Sula dactylatra melanops} Espanola/Hood Is, Galapagos Book page 125

Konrad Wothe / Masked Booby (Sula dactylatra) couple courting at sunset, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) incubating egg on ground nest, Paradise Peninsula, Palmyra Atoll, US Line Islands, tropical Pacific

Tui De Roy / Masked Booby (Sula dactylatra) incubating egg on ground nest, Paradise Peninsula, Palmyra Atoll, US Line Islands, tropical Pacific

Flip Nicklin / Masked Booby (Sula dactylatra) couple at nest, Hawaiian Leeward Islands

Flip Nicklin / Masked Booby (Sula dactylatra) with two chicks, Hawaiian Leeward Islands

Tui De Roy / Masked Booby (Sula dactylatra) taking off from open ocean, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) flying, coming to land on cliff edge, Wenman Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) couple allopreening during courtship, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) couple allopreening during courtship, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Sharp-beaked Ground-Finch (Geospiza difficilis) drawing blood from base of Masked Booby (Sula dactylatra) feathers, an adaptation unique to Wenman Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) courting pairs roosting on cliff edge, Wenman Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) fledgling stretching wings, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) couple courting at sunset, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) calling at nest site, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) showing binocular vision, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) calling, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) observed by tourists that frequently get in their way, Punta Suarez, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) yawning, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) portrait, Tower Island, Galapagos Islands, Ecuador

Tui De Roy / Masked Booby (Sula dactylatra) pair courting at sunset, Daphne Island, Galapagos Islands, Ecuador

Mitsuaki Iwago / Masked Booby (Sula dactylatra) parent with chick on white sand beach, Hawaiian Leeward Islands, Hawaii

Mike Read / Nazca booby flying {Sula dactylatra granti} Galapagos

Mike Read / Nazca booby chick {Sula dactylatra granti} Galapagos

Mike Read / Nazca booby pair {Sula dactylatra granti} Galapagos

Mike Read / Nazca boobies {Sula dactylatra granti} Galapagos

Tony Heald / Masked booby feeding chick {Sula dactylatra melanops} Galapagos-Islands

Tony Heald / Masked booby and chick {Sula dactylatra melanops} Galapagos

Tony Heald / Masked booby feeding chick {Sula dactylatra melanops} Galapagos-Islands

Pete Oxford / Masked boobies on rock {Sula dactylatra melanops} Espanola/Hood Is, Galapagos Book page 122

Pete Oxford / Masked booby {Sula Dactylatra melanops} portrait, Genovesa Is, Galapagos

Pete Oxford / Blue Faced (Masked) Booby, Galapagos

Steve Gettle / Masked Booby (Sula dactylatra) carrying rock for nest building, Galapagos Islands, Ecuador

Steve Gettle / Masked Booby (Sula dactylatra), Galapagos Islands, Ecuador

Nick Upton / Nazca booby (Sula dactylatra granti) dominant chick evicting younger sibling from the nest while adult watches, Espanola Is, Galapagos