Chinchilla

Chinchillas are crepuscular rodents, slightly larger and more robust than ground squirrels, and are native to the Andes mountains in South America. They live in colonies at high altitudes (up to 15,000 ft/4,270 m) in the Andes of Bolivia, Chile, and Peru. Along with their relatives, viscachas, they make up the family Chinchillidae.

http://en.wikipedia.org/wiki/Chinchilla