Collared lemming
Dicrostonyx groenlandicus Dicrostonyx hudsonius Dicrostonyx nelsoni Dicrostonyx nunatakensis Dicrostonyx richardsoni Dicrostonyx torquatus Dicrostonyx unalascensis 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.This Arvicolinae article is a stub.You can help Wikipedia by expanding it.