|Scientific Name:||Microtus oregoni|
|Species Authority:||(Bachman, 1839)|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||Linzey, A.V. & NatureServe (Hammerson, G.)|
|Reviewer(s):||Amori, G. (Small Nonvolant Mammal Red List Authority) & Chanson, J. (Global Mammal Assessment Team)|
Listed as Least Concern, although it has a patchy distribution and sometimes is uncommon, its population is thought to be stable, it is adaptable and there are no major threats.
|Range Description:||This species is found in southwestern British Columbia, Canada, south through western Washington and western Oregon to northwestern California in the United States.|
Native:Canada (British Columbia); United States (California, Oregon, Washington)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is considered secure within its range (NatureServe). Densities vary with habitat and over time due to changes in habitat quality. They can be fewer than 15 per hectare in mature forests, and up to 138 per hectare in clear cuts and old fields.|
|Habitat and Ecology:||
It is found in the moist forests of the Pacific coast, brushy, grassy areas. It is most abundant in more xeric sites, especially those supporting stands of short grass, but may favour riparian areas in some localities. More abundant in clearcuts than in virgin forest. It occupies shallow burrows and low cover.
Young are born in nests, dry grasses are placed in cavities under logs or in similar protected sites. Breeding occurs mainly from March to September in Oregon and British Columbia. Gestation is approximately 23 days. Females are estimated to produce a maximum of four or five litters per year, with approximately three to four young per litter.
Diet consists primarily of green vegetation (presumably both forbs and grasses); they also eat fungi. Although active at any time, this species is most active at night.
|Major Threat(s):||There are no major threats to this species. In coastal British Columbia, creeping voles were apparently unaffected by herbicide treatment of Douglas-fir plantation (Sullivan 1990).|
|Conservation Actions:||This species is not of conservation concern and its range includes several protected areas.|
|Citation:||Linzey, A.V. & NatureServe (Hammerson, G.) 2008. Microtus oregoni. The IUCN Red List of Threatened Species. Version 2015.2. <www.iucnredlist.org>. Downloaded on 30 August 2015.|
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