|Scientific Name:||Sorex arcticus|
|Species Authority:||Kerr, 1792|
|Taxonomic Notes:||S. a. maritimensis Smith 1939 is now considered a distinct species, as suggested by Volobouev and van Zyll de Jong (1988).|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor/s:||NatureServe (Hammerson, G.)|
|Reviewer/s:||Amori, G. (Small Nonvolant Mammal Red List Authority) & Chanson, J. (Global Mammal Assessment Team)|
Listed as Least Concern because it is a very widespread and abundant species with no known threats.
|Range Description:||This species occurs from Yukon and Northwest Territory to Quebec in Canada; southwards to North Dakota, South Dakota, Minnesota, Michigan, and Wisconsin in the United States (Hutterer, in Wilson and Reeder 1993; Kirkland and Schmidt 1996). The disjunct populations in Nova Scotia and New Brunswick have now been elevated to species status (S. maritimensis).|
Native:Canada; United States
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It is a widespread and abundant species.|
|Habitat and Ecology:||
This species is most commonly found in grass-sedge marshes, wet meadows, and other moist openings in and adjacent to boreal forest. It is also present, in fewer numbers, in tamarack-spruce bogs and cedar swamps. Small globular nests are usually made above ground under logs or other material. In the south, breeding occurs in late winter to mid-summer. Gestation lasts three weeks and litter size is five to nine, with an average of three litters per year. Young-of-the-year may breed in the first summer in some areas (Baird et al. 1983).
The species' home range is around 1/4 acre (Buckner 1966). Populations fluctuate annually from less than one to four per acre (Buckner 1966). High population turnover, with approximately 80% of each generation dead prior to sexual maturity (Buckner 1966). The arctic shrew is dependent nearly exclusively on insects. Destructive sawfly larvae seasonally constitute a large part of their diet (Buckner 1964). It is active day and night and like many shrews, major activity peaks at night.
|Major Threat(s):||There are no major threats to this species.|
|Conservation Actions:||This species occurs in protected areas throughout its range.|
|Citation:||NatureServe (Hammerson, G.) 2008. Sorex arcticus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 10 March 2014.|
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