Group of wild nutrias, myocastor coypus perform social grooming or allogrooming on each other in front of their burrow home on the riverside, native species to subtropical and temperate South America

nutria coypu coypus beaver otter wildlife rodent group habitat invasive allogrooming colony swamp species animal scratch myocastor affection rat burrow bath itch family teeth mite mouse wild river claw fur coipo den lake groom pest south america drainage water hole infectious disease natural maintain wet social body europe clean flea