Cyril Ruoso / Guanay cormorant (Phalacrocorax bougainvillii) just above breeding colony on guano island, Isla Pescadores, Peru

Cyril Ruoso / Band-tailed Gull (Larus belcheri) preying on the egg of a Guanay Cormorant (Phalacrocorax bougainvillii), Isla Pescadores, Peru

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 / Peruvian Booby (Sula variegata) adult and chicks at nest, Isla Pescadores, Peru

Cyril Ruoso / Guanay Cormorant (Phalacrocorax bougainvillii) breeding colony on a guano island, Isla Pescadores, Peru

Cyril Ruoso / Guanay Cormorant (Phalacrocorax bougainvillii) breeding colony on a guano island, Isla Pescadores, Peru

Grant Dixon / Cacti on Isla de Pescadores with salt pan in the background, Salar de Uyuni, Bolivia

Doug Allan / Cacti on Isla de Pescadores, isolated barren island in saltflats of Salar de Uyuni, altiplano at 4000m, Bolivia.

Cyril Ruoso / Peruvian Booby (Sula variegata) with chicks at nest, Isla Pescadores, Peru

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

Cyril Ruoso / Peruvian Booby (Sula variegata) calling, Isla Pescadores, Peru

Cyril Ruoso / Peruvian Booby (Sula variegata) and begging chicks at nest, Isla Pescadores, Peru

Cyril Ruoso / Guanay Cormorant (Phalacrocorax bougainvillii) nesting colony on a guano island, Isla Pescadores, Peru