Chacoan mara
The Chacoan mara ("Dolichotis salinicola") is a relatively large South American rodent of the cavy family. They are a close relative of the better known Patagonian mara. Habitat. The Chacoan mara lives in the South American Chaco, the dry thorny forests and grasslands of Argentina, Paraguay, and Bolivia. Maras dig a burrow to sleep in at night. Food and diet. The Chacoan mara eat grasses and other herbage. They will eat nearly any available vegetation. Specifically, the Chacoan cavy ("Pediolagus salinicola)" selects forbs, grasses, succulents, and trees in the dry season and grasses in the wet season. Annual  forbs are eaten in the wet season as well. Social structure. Chacoan maras live in small groups of up to four animals. Scientific classification and relatives. The Chacoan mara is from the family Caviidae, which includes cavies, such as their larger relative the capybara, and guinea pigs. Chacoan maras are closely related to the other member of the genus "Dolichotis", the Patagonian mara. Despite the Chaocan cavy’s close resemblance and coexistence to the Patagonian Mara, they have a broader niche to allow coexistence with its relative. This flexibility is reflected by its subfamily’s high diversity, recorded as early  as the late Miocene epoch. Maras are the fourth largest rodent in the world after the capybaras, beavers and porcupines . Though the mara may look like a rabbit, the rabbit is not actually a rodent and therefore not as closely related to the mara as one might expect.