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.