Cyril Ruoso / Northern viscacha (Lagidium peruanum) adult and young Cordillera Blanca Massif, Andes, Peru.

Staffan Widstrand / Northern Viscacha or Vizcacha (Lagidium peruanum) resting in an old man made structure, Machu Picchu UNESCO World Heritage Site, Peru. February.

JIM CLARE / Mountain viscacha {Lagidium viscacia}, near Andahuaylas, Andes, Peru, South America

Oscar Dewhurst / Northern viscacha (Lagidium peruanum) feeding on grasses, Machu Picchu UNESCO World Heritage Site, Peru, 02/14

Oscar Dewhurst / Northern viscacha (Lagidium peruanum) on rock at Machu Picchu UNESCO World Heritage Site, Peru. February

Daniel Heuclin / Southern viscacha (Lagidium viscacia) lying in shade of rock, Andes, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) feeding, Andes, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) sitting on a rock, Andes, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) jumping between rocks, Andes, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) lying in shade of rock, Andes, Bolivia.

Daniel Heuclin / Tourist feeding and photographing Southern viscacha (Lagidium viscacia), Andes, Bolivia.

Jeff Foott / Wolffsohn's viscacha (Lagidium wolffsohni) Future Patagonia National Park, Chile.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Daniel Heuclin / Southern viscacha (Lagidium viscacia) near Laguna Colorada, Bolivia.

Agustin Esmoris / Southern Viscacha (Lagidium viscacia) grazing, Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia) mother and young, Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Huascaran National Park UNESCO World Heritage Site, Andes, Peru.

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Huascaran National Park UNESCO World Heritage Site, Andes, Peru.

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Huascaran National Park UNESCO World Heritage Site, Andes, Peru.

Bernard Castelein / Southern Viscacha (Lagidium viscacia) at rest, Siloli Desert, altiplano, Bolivia

Bernard Castelein / Southern Viscacha (Lagidium viscacia) at rest, Siloli Desert, altiplano, Bolivia

Bernard Castelein / Southern Viscacha (Lagidium viscacia) at rest, Siloli Desert, altiplano, Bolivia

Bernard Castelein / Southern Viscacha (Lagidium viscacia) at rest, Isla Incahuasi in the Salar de Uyuni, altiplano, Bolivia

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Huascaran National Park, Cordillera Blanca, Andes, Peru

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Huascaran National Park, Cordillera Blanca, Andes, Peru

Cyril Ruoso / Northern viscacha (Lagidium peruanum) two playing together, Huascaran National Park, Cordillera Blanca, Andes, Peru

Lucas Bustamante / Northern viscacha (Lagidium peruanum) sitting on the walls of Machu Picchu, Urubamba , Peru.

Cyril Ruoso / Northern viscacha (Lagidium peruanum) adult, Cordillera Blanca Massif, Peru.

Cyril Ruoso / Northern viscacha (Lagidium peruanum) Cordillera Blanca Massif, Andes, Peru, November.

Cyril Ruoso / Northern Viscacha (Lagidium peruanum), Huascaran National Park, Cordillera Blanca, Peru

Cyril Ruoso / Northern Viscacha (Lagidium peruanum), Huascaran National Park, Cordillera Blanca, Peru

Cyril Ruoso / Northern Viscacha (Lagidium peruanum) browsing, Huascaran National Park, Cordillera Blanca, Peru

Cyril Ruoso / Northern Viscacha (Lagidium peruanum), Huascaran National Park, Cordillera Blanca, Peru

Roland Seitre / Southern Viscacha (Lagidium viscacia) La Paz, Bolivia.

Roland Seitre / Southern Viscacha (Lagidium viscacia) Reserva Nacional Salinas Aguada Blanca / Salinas and Aguada Blanca National Reservation Arequipa region, Peru.

Roland Seitre / Southern Viscacha (Lagidium viscacia) Reserva Nacional Salinas Aguada Blanca / Salinas and Aguada Blanca National Reservation Arequipa region, Peru.

Roland Seitre / Southern Viscacha (Lagidium viscacia) Reserva Nacional Salinas Aguada Blanca / Salinas and Aguada Blanca National Reservation Arequipa region, Peru.

Roland Seitre / Southern Viscacha (Lagidium viscacia) in Puna grassland, Charazani, La Paz region, Bolivia.

Chris Mattison / Viscacha (Lagidium viscacia) resting, Chilean Andes, Chile.

Chris Mattison / Viscacha (Lagidium viscacia) resting, Chilean Andes, Chile.

Cyril Ruoso / Northern Viscacha (Lagidium peruanum) portrait, Cordillera Blanca Mountain Range, Andes, Peru

Hanne & Jens Eriksen / Common / Southern mountain viscacha {Lagidium viscacia} Lauca NP, Chile

Pete Oxford / Common / Southern mountain viscacha {Lagidium viscacia} on rocks at Machu Picchu, Peru

Pete Oxford / Common / Southern mountain viscacha {Lagidium viscacia} Lauca NP, Chile

Ingrid Visser / Southern Viscacha (Lagidium viscacia) on rocks, Chile

Pete Oxford / Common mountain viscacha (Lagidum viscacia) on rocks, Inkawasi Island, Salar de Uyuni, Bolivia

Theo Allofs / Plains Viscacha (Lagostomus maximus) resting on rock, Salar de Surire National Monument, northern Chile

RHONDA KLEVANSKY / Common mountain viscacha {Lagidium viscacia} Inkawasi Is Salar de Uyuni, Bolivia

Pete Oxford / Common mountain viscacha {Lagidium viscacia} Inkawasi island, Salar de Uyuni, SW Bolivia

Hanne & Jens Eriksen / Common mountain viscacha {Lagidium viscacia} Lauca NP, Chile

Luiz Claudio Marigo / Common mountain viscacha {Lagidium viscacia} Lauca NP, Andes, N Chile

Pete Oxford / Southern Viscacha (Lagidium viscacia) sitting on rock, altiplano, Bolivia

Tui De Roy / Southern Viscacha (Lagidium viscacia) feeding in high elevation Andean wetland adjacent to colony in boulder field, Lauca National Park, Chile

Pete Oxford / Common mountain viscacha, Lauca National Park, Chile, South America.

Pete Oxford / Common mountain viscacha, Lauca NP, Chile, South America

Agustin Esmoris / Southern Viscacha (Lagidium viscacia) mother and young, Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia) mother and young, Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia) mother and young, Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Patagonia, Argentina

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni) pair, Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Jeff Foott / Wolffsohn's Viscacha (Lagidium wolffsohni), Chacabuco Valley, Aysen, Chile

Sebastian Kennerknecht / Southern Viscacha (Lagidium viscacia), Abra Granada, Andes, northwestern Argentina

Sebastian Kennerknecht / Southern Viscacha (Lagidium viscacia), Ciudad de Piedra, Andes, western Bolivia

Sebastian Kennerknecht / Southern Viscacha (Lagidium viscacia), Ciudad de Piedra, Andes, western Bolivia

Cyril Ruoso / Northern Viscacha (Lagidium peruanum), Huascaran National Park, Cordillera Blanca, Peru

Paul D Stewart / Illustration of Viscacha (Lagidium sp.). Plate 42 from Volume 1 Trans Zool Soc London, 1835, 'Additional remarks on the Genus Lagotis, with some account of a second species referrible to it' with cont...

Pete Oxford / Common mountain viscacha {Lagidium viscacia} Inkawasi island, Salar de Uyuni, SW Bolivia

Pete Oxford / Common mountain vizcacha {Lagidium viscacia} sitting in the sun, Lauca NP, Chile

Hanne & Jens Eriksen / Common mountain viscacha {Lagidium viscacia} Lauca NP, Andes, Chile

Pete Oxford / Common mountain viscacha (Lagidium viscacia). Machu Picchu, Peru, South America

Pete Oxford / Common mountain viscacha, Lauca NP, Chile, South America

Pete Oxford / Common mountain viscacha {Lagidium viscacia} Salar de Uyuni, Bolivia, South America

Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating and looking around. Then the animal grooms itself. Zie-Zoo, Volkel. Captive.

Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.

Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating, Zie-Zoo, Volkel. Captive.

Joel Sartore / Photo Ark / Plains viscacha (Lagostomus maximus) eating. Then the animal stops and sniffs the air. Zie-Zoo, Volkel. Captive.

Joel Sartore / Photo Ark / Northern viscacha (Lagidium peruanum) profile, looking around, Parque de Las Leyendas. Captive.

Roland Seitre / Plains viscacha (Lagostomus maximus) with suckling baby, Argentina, captive.

Roland Seitre / Plains viscacha (Lagostomus maximus) with suckling babies, Argentina, captive.

Agustin Esmoris / Southern Viscacha (Lagidium viscacia), Chubut, Patagonia, Argentina