Nelson collar lemming

Nelson collar lemming
	Nelson collar lemming in summer (generalized) and winter fur
Systematics
Superfamily :	Mice-like (Muroidea)
Family :	Burrowers (Cricetidae)
Subfamily :	Voles (arvicolinae)
Tribe :	Dicrostonychini
Genre :	Collared Lemmings ( Dicrostonyx )
Type :	Nelson collar lemming
Scientific name
	Dicrostonyx nelsoni
	Merriam , 1900

Distribution area of the Nelson collar lemming.

The Nelson Collared Lemming ( Dicrostonyx nelsoni ) is a rodent in the subfamily of voles that is found in northwest North America. For a long time the population was considered a subspecies of the Northern Collared Lemming ( Dicrostonyx groenlandicus ).

features

The species reaches a head body length of 10.8 to 14.2 cm, a tail length of 1.1 to 2.1 cm and a weight of 45 to 55 g. The summer coat is predominantly gray-brown and there may be a reddish spot behind each ear. In some specimens, the red spots are united to form a collar. Many Nelson collar lemmings have a more or less distinct dark eel line on their back. The winter fur is white throughout.

distribution

This collar lemming is found in western Alaska . It is also native to various islands in the Bering Strait and the eastern Aleutian Islands . The population on St. Lawrence Island was temporarily recognized as an independent species ( Dicrostonyx exsul ). Wilson & Reeder (2005) and the IUCN use this population as a synonym for the Nelson collar lemming. The species lives in drier areas of the tundra and in bushes.

Way of life

The Nelson Collared Lemming eats different parts of plants such as leaves, flowers, buds, roots, herbs and sour grasses . The winter food consists mainly of pastures . The species can be active day and night and does not hibernate . Reproduction does not seem to be tied to a specific season either. After about 20 days of gestation , a litter consists of up to eight offspring.

status

There are no known threats to the species. It is listed as Least Concern by the IUCN .

Individual evidence

↑ ^a ^b ^c Dicrostonyx nelsoni in the endangered Red List species the IUCN 2018 Posted by: Cassola, F., 2016. Retrieved on June 8 of 2019.
↑ Roland W. Kays & Don E. Wilson (Eds.): Mammals of North America . Princeton University Press, 2009, pp. 144 (English, Dicrostonyx nelsoni ).
↑ ^a ^b ^c Wilson, Lacher Jr. & Mittermeier (Eds.): Handbook of the Mammals of the World . 7 - Rodents II. Lynx Edicions, 2017, ISBN 978-84-16728-04-6 , pp. 298 (English).
↑ Don E. Wilson , DeeAnn M. Reeder (Ed.): Mammal Species of the World . A taxonomic and geographic Reference . 3. Edition. 2 volumes. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 (English, Dicrostonyx nelsoni ).

[IUCN-1] Dicrostonyx nelsoni in the endangered Red List species the IUCN 2018 Posted by: Cassola, F., 2016. Retrieved on June 8 of 2019.

[Kays-2] Roland W. Kays & Don E. Wilson (Eds.): Mammals of North America . Princeton University Press, 2009, pp. 144 (English, Dicrostonyx nelsoni ).

[HMW-3] Wilson, Lacher Jr. & Mittermeier (Eds.): Handbook of the Mammals of the World . 7 - Rodents II. Lynx Edicions, 2017, ISBN 978-84-16728-04-6 , pp. 298 (English).

[Wilson-4] Don E. Wilson , DeeAnn M. Reeder (Ed.): Mammal Species of the World . A taxonomic and geographic Reference . 3. Edition. 2 volumes. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 (English, Dicrostonyx nelsoni ).