Coypu

The nutria or coypu (Myocastor coypus) is an herbivorous, semiaquatic rodent native to South America.

Classified for a long time as the only member of the family Myocastoridae, Myocastor has since been included within Echimyidae, the family of the spiny rats.

The nutria lives in burrows alongside stretches of water and feeds mainly on aquatic and riparian vegetation. In its native range it forms part of South American wetland food webs and can contribute to the dispersal of aquatic plants and spores.

Native to subtropical and temperate South America, it was introduced to North America, Europe and Asia, primarily by fur farmers. Although it is still hunted and trapped for its fur in some regions, introduced populations can damage wetland vegetation and infrastructure through feeding and burrowing, and the species is considered invasive in several countries. Some populations can carry some zoonotic pathogens, including pathogenic Leptospira, although their epidemiological significance is scarce and region-specific.

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