Guanacos: These camelid relatives are the largest native land mammals on the peninsula.

Armadillos: You can find different species of armadillos, such as the Screaming hairy armadillo.

Maras: These are also known as Patagonian hares.
Skunks: Both Molina's hog-nosed skunks and skunks in general are present.

Other rodents: Smaller mammals include various types of mice, cavies, and other rodents.

Other species: You may also see pumas, grey wolves (or grey foxes), and European hares. 

Distribution and abundance of mammals inside Península Valdés is not homogeneous and result from several factors such as vegetation structure, geo- morphology and human activities among others interacting elements.

For example the Pallid fat-tailed opossum Thylamys pallidior occupies most of the area, although it is clearly more frequent in the western and northern parts of the peninsula where the Monte vegetation Sites for Conservation" prevail, while the Big hairy armadillo is more common in the north.