Mark Bowler / Inca tern {Larosterna inca}in flight, Paracas National Park, Peru

JIM CLARE / Pair of Inca terns, (Larosterna inca). Punta San Juan Reserve, (Reserva Nacional de Islas, Islotes y Puntas Guaneras) Peru.

Konrad Wothe / Inca tern (Larosterna inca) South America, captive

Konrad Wothe / Inca terns (Larosterna inca) South America, captive.

Cyril Ruoso / Inca tern (Larosterna inca) perching on cliff face in Nazca coastal desert in Paracas National Reserve, Peru

Cyril Ruoso / Inca terns (Larosterna inca) courtship behaviour, Punta San Juan, Peru

Cyril Ruoso / Inca tern (Larosterna inca) male and female in courtship display, guano island, Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) male and female pairs in courtship display, guano island, Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) male and female pairs in courtship display, guano island, Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) small flock on rocks, guano island Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) taking off from guano island Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) arriving at nest site with fish in beak, guano island, Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) in flight, guano island Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) head profile, guano island Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) profile portrait, guano island of Pescadores, Peru

Cyril Ruoso / Inca tern (Larosterna inca) profile portrait, guano island of Pescadores, Peru

Marcos Baumann/ BIA / Inca Tern (Larosterna inca) calling, Valparaiso, Chile

Cyril Ruoso / Inca Tern (Larosterna inca) calling, Isla Pescadores, Peru

Cyril Ruoso / Inca Tern (Larosterna inca) pair in courtship display, Isla Pescadores, Peru

Cyril Ruoso / Inca Tern (Larosterna inca)roosting on cliff, Paracas National Reserve, Peru

Glenn Bartley / Inca Tern (Larosterna inca), Peru

Glenn Bartley / Inca Tern (Larosterna inca), Islas Ballestas, Peru

Rosl Roessner / Inca Tern (Larosterna inca)

Mark Bowler / Portrait of an Inca Tern (Larosterna inca). Paracas National Reserve, Peru.

Mark Bowler / Portrait of an Inca Tern (Larosterna inca). Paracas National Reserve, Peru.

Kevin Schafer / Large flock of seabirds including Peruvian pelicans (Pelecanus thagus) and Inca terns (Larosterna inca) feeding near a small boat, Pucusana, Peru

Kevin Schafer / Inca terns (Larosterna inca) flying over sea, Punta Corrientes, Peru

Kevin Schafer / Inca Tern (Larosterna inca) pair courting, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) pair courting, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) pair courting, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) pair courting, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) portrait, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) flying, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) portrait, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) pair courting, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) flying, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) flying, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) flock flying over ocean, Pucusana, Peru

Kevin Schafer / Inca Tern (Larosterna inca) calling, Pucusana, Peru

Pete Oxford / Inca tern {Larosterna inca} juvenile head profile Iquique, Chile.

Staffan Widstrand / Inca terns perched on cliff {Larosterna inca} Inkaterna, Peru, South America

Pete Oxford / Pair of Inca terns (Larosterna inca) mating, Iquique, Chile, South America

Pete Oxford / Inca tern portrait {Larosterna inca} Iquique, Chile

Pete Oxford / Inca tern, Iquique, Chile, South America

Pete Oxford / Inca tern, Iquique, Chile, South America

Pete Oxford / Inca tern, Iquique, Chile, South America

Pete Oxford / Inca tern, Iquique, Chile, South America

Pete Oxford / Inca tern, Iquique, Chile, South America

Cyril Ruoso / Inca Tern (Larosterna inca), Isla Pescadores, Peru

Roland Seitre / Inca tern (Larosterna inca) perched on rocks, spreading wings and calling, Guanape Islands, Peru.

Roland Seitre / Inca tern (Larosterna inca) portrait, Guanape Islands, Peru.

Roland Seitre / Inca tern (Larosterna inca) calling, head portrait, Guanape Islands, Peru.

Roland Seitre / Inca tern (Larosterna inca) pair, with chick at nest site, Guanape Islands, Peru.

Roland Seitre / Two Inca terns (Larosterna inca) calling, head portrait, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) calling, head portrait, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) flock in flight over the ocean, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) flock in flight over the ocean, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) in flight over the ocean, Guanape Islands, Peru, Pacific Ocean.

Roland Seitre / Inca tern (Larosterna inca) flock perched on coastal rocks, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) flock in flight over coastal cliffs, Guanera Punta San Juan, Ica, Peru, Pacific Ocean.

Roland Seitre / Inca tern (Larosterna inca) flock taking flight, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) flock perched on coastal rocks, Guanera Punta San Juan, Ica, Peru.

Roland Seitre / Inca tern (Larosterna inca) in flight over the ocean, Guanape Islands, Peru, Pacific Ocean.

Roland Seitre / Inca terns (Larosterna inca) landing on cliffside, Guanape Islands, Peru, Pacific Ocean.

Roland Seitre / Two Inca terns (Larosterna inca) perched on pile of bricks, one resting the other spreading wings and calling, Guanape Islands, Peru.

Roland Seitre / Humboldt penguin (Spheniscus humboldti) with chick, on nest, with Inca tern (Larosterna inca) in background, Guanera Punta San Juan reserve, Ica, Peru. IUCN: Vulnerable.

Roland Seitre / Inca Tern (Larosterna inca), native to South America

Roland Seitre / Inca Tern (Larosterna inca), Peru

Roland Seitre / Inca Tern (Larosterna inca) pair, Peru

Roland Seitre / Inca Tern (Larosterna inca), Peru

Frederique Olivier / Inca tern (Larosterna inca) preening on a moving rope, with juvenile nearby, Chile.

Frederique Olivier / Three Inca terns (Larosterna inca) standing on rope, one with fish, Chile.

Frederique Olivier / Inca terns (Larosterna inca) on moving ropes, Chile.

Frederique Olivier / Five Inca terns (Larosterna inca) on ropes, moving with the swell, Chile.