Alpha-Cure Ltd on Twitter: "Fun Fact - Northern Collared Lemmings build underground 'toilets' to defecate in so that their ultraviolet feaces cannot be picked up and seen by birds of prey. #FunFact #
Northern collared lemming Dicrostonyx groenlandicus , Ellesmere Island, Nunavut, High Arctic Canada
Northern Collared Lemming (Baffin bay mammals - all) · iNaturalist