The reserve gives shelter to the last colonies of Long-tailed Chinchillas in the wild.

Animals that take part in these encounters include ferrets, four-toed hedgehogs, gambian pouched rats, lesser hedgehog tenrecs, and long-tailed chinchillas.

Today, both the short-tailed and long-tailed chinchillas are listed at "endangered" in Chile and as "Critically Endangered" by the IUCN.

The long-tailed chinchilla (Chinchilla lanigera), also called the Chilean, coastal, common chinchilla, or lesser chinchilla, is one of two species of rodents from the genus Chinchilla, the other species being Chinchilla chinchilla.

Chinchilla lanigera can still be found in the wild, but has become rare.

There are two species of chinchilla, Chinchilla brevicaudata and chinchilla lanigera.

The long-tailed chinchilla (Chinchilla lanigera), also called the Chilean, coastal, common chinchilla, or lesser chinchilla, is one of two species of rodents from the genus Chinchilla, the other species being Chinchilla chinchilla.