Collared lemming

Dicrostonyx is a genus of rodent in the family Cricetidae.^[1] It contains the collared lemmings or varying lemmings. They are the only North American rodents that turn completely white in winter.^[2] It contains the following species:

• Northern collared lemming (Dicrostonyx groenlandicus)
• Ungava collared lemming (Dicrostonyx hudsonius)
• Nelson's collared lemming (Dicrostonyx nelsoni)
• Ogilvie Mountains collared lemming (Dicrostonyx nunatakensis)
• Richardson's collared lemming (Dicrostonyx richardsoni)
• Arctic lemming (Dicrostonyx torquatus)
• Unalaska collared lemming (Dicrostonyx unalascensis)

Collared lemmings Temporal range: Early Pleistocene to Recent
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Cricetidae
Subfamily:	Arvicolinae
Tribe:	Dicrostonychini
Genus:	Dicrostonyx Gloger, 1841
Type species
Mus hudsonius Pallas, 1778
Species
Dicrostonyx groenlandicus Dicrostonyx hudsonius Dicrostonyx nelsoni Dicrostonyx nunatakensis Dicrostonyx richardsoni Dicrostonyx torquatus Dicrostonyx unalascensis