The Patagonian mara (Dolichotis patagonum) is a relatively large rodent in the mara genus. It is also known as the Patagonian cavy, Patagonian hare or dillaby. This herbivorous, somewhat rabbit-like animal is found in open and semi-open habitats in Argentina, including large parts of Patagonia.

Mara jest największym gatunkiem kawiowatym i trzecim co do wielkości gatunkiem gryzoni.