Pete Oxford / Giant Titicaca Lake frog {Telmatobius culeus} Lake Titicaca. Bolivia / Peru

Bert Willaert / Titicaca water frog (Telmatobius culeus) swimming underwater, Lake Titicaca, Bolivia. Critically endangered species.

Bert Willaert / Titicaca water frog (Telmatobius culeus) underwater resting on the lake bed, Lake Titicaca, Bolivia. Critically endangered species.

David Noton / Woman and man with livestock walking along path, Isla del Sol, Lake Titicaca, Bolivia, December 2009

Pete Oxford / Lake Titicaca with local Indian in traditional reed boat and Giant Titicaca frog {Telmatobius culeus} in foreground, captive release, Bolivia

Pete Oxford / Giant Titicaca frog {Telmatobius culeus} Lake Titicaca, Bolivia / Peru largest

Pete Oxford / Giant aquatic frog {Telmatobius escomeli} Altiplano lakes, Peru

Pete Oxford / Giant Titicaca frog {Telmatobius culeus} and researcher Esther Perez, Lake Titicaca. Boliivia / Peru. Totora reed boat in background. 2002

Pete Oxford / Traditiona Totora reed boat & Aymara, Lake Titicaca, Bolivia / Peru, South America

Oscar Dewhurst / Many-coloured rush tyrant (Tachuris rubrigastra) perched on reed stem at the water's edge. Lake Titicaca, Puno, Peru. September. Cropped

Oscar Dewhurst / White-tufted / Rolland's grebe (Rollandia rolland) swimming in Lake Titicaca, Puno, Peru. September. Cropped

Oscar Dewhurst / Titicaca/short-winged grebe (Rollandia microptera) swimming in Lake Titicaca, Puno, Peru. September