Sorex hoyi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Eulipotyphla Soricidae

Scientific Name: Sorex hoyi Baird, 1857
Common Name(s):
English American Pygmy Shrew, Pygmy Shrew
Taxonomic Notes: Formerly included in the genus Microsorex.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-08-18
Assessor(s): Cassola, F.
Reviewer(s): Amori, G.
Contributor(s): Hammerson, G.A. & Dirrigl Jr., F.
Listed as Least Concern because it is very widespread, its population is not in decline and there are no major threats.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is distributed throughout much of Canada and Alaska (United States), excluding northern tundra zones. Contiguous American populations are limited to the northern Rocky Mountains, Great Lakes region, and New England, with disjunct populations in the Southern Rockies (e.g., northern Colorado) and Appalachians (e.g., widespread and locally abundant in Virginia). In the 1970s and 1980s, it was recorded in southern Indiana, Kentucky, and western Tennessee (see Feldhamer et al. 1993), and South Carolina (Mengak et al. 1987).
Countries occurrence:
Canada; United States
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The total population size of this species is unknown but most likely is greater than 10,000. On a global scale, there is little reason to believe that a significant decline has occurred. In Michigan, densities of 0.2 to two individuals per acre were estimated (Baker 1983).
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It is found in a variety of habitats, and appears to prefer grassy openings of boreal forest. Moist habitats are preferred over dry areas. In Kentucky-Tennessee, it was much less active above ground than was S. longirostris (Feldhamer et al. 1993). Nest sites are not well known. In Kentucky-Tennessee, the primary birth period was January to early March; individuals entered the trappable population about eight weeks later; births also occurred August to December but at a lower rate; few were born in June and July (Feldhamer et al. 1993). Gestation lasts probably two to three weeks, and litter size is five to six. They reach sexual maturity in their second summer.

The pygmy shrew is primarily dependent upon invertebrates. Their diet in New Brunswick included mainly insect larvae, beetles, and spiders (Whitaker and French 1984). The peak activity occurs at night.
Generation Length (years):1

Threats [top]

Major Threat(s): This species is not significantly threatened at present.

Conservation Actions [top]

Conservation Actions: At present, there are no major global level protection needs, though protection of the disjunct southern populations may be a priority at a national or subnational scale. They probably occur in several protected occurrences in federal and state/provincial parks/refuges.

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Citation: Cassola, F. 2016. Sorex hoyi (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T41400A115183871. . Downloaded on 16 October 2018.
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