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Collared lemming
Dicrostonyx
is
a genus
of
rodent
in the
family
Cricetidae
. It
contains
the
collared
lemmings
. They are the only
North American
rodents
that
turn
completely
white
in
winter
.
It contains the following species:
Northern collared lemming
Ungava collared lemming
Nelson's collared lemming
Ogilvie Mountains collared lemming
Richardson's collared lemming
Arctic lemming
Unalaska collared lemming
Wrangel lemming