The pression exerted by the altitude is determining for the development of the mammals.
The birds and reptiles adapt easily to the changes in temperature and the influence of the winds.
Among the reptiles, there are: saurious, , the ophidian is scanty.
The mammals are the armadillo,, piche, mataco,gray fox, weasel, mara, guemal, puma, guanaco, different varieties of rodents.
Birds: ñandu, ducks, condors, crows, falcan,dove,parrot, owl, chingolo, swallow, etc.
Reptiles: snake, lizards, iguanas.
There are trout, mackerel, fresh-water fish, catfish and sea-fish in the rivers.