Ictidomys tridecemlineatus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Sciuridae

Scientific Name: Ictidomys tridecemlineatus Mitchill, 1821
Common Name(s):
English Thirteen-lined Ground Squirrel, Big Horn Thirteen-lined Ground Squirrel
Spermophilus tridecemlineatus (Mitchill, 1821)
Taxonomic Source(s): Helgen, K.M., Cole, F.R.,Helgen, L.E. and Wilson, D.E. 2009. Generic revision in the Holarctic ground squirrel genus Spermophilus. Journal of Mammalogy 90(2): 270-305.
Taxonomic Notes: This species is known to hybridize at several localities with S. mexicanus (see Thorington and Hoffmann, in Wilson and Reeder 2005).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-08-08
Assessor(s): Cassola, F.
Reviewer(s): Amori, G.
Contributor(s): Hammerson, G.A. & Linzey, A.
Listed as Least Concern because it is very widespread, common throughout almost its entire range, and there are no major threats.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species has an extensive range in the central United States and adjoining Canada, from southern Alberta, Saskatchewan, and Manitoba southward to extreme east central Arizona, the Texas Gulf Coast, and central Ohio. A disjunct population segment straddles the Arizona-New Mexico border.
Countries occurrence:
Canada (Alberta, Manitoba, Ontario, Saskatchewan); United States (Arizona, Colorado, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Ohio, Oklahoma, Pennsylvania, South Dakota, Texas, Utah, Wisconsin, Wyoming)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is widespread and common. Densities are estimated at 2.5 to 5/ha in spring and 24.5/ha following emergence of young.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It is restricted to dry and sandy (and "tighter") soils of open areas, such as grasslands, cultivated fields, meadows, roadsides, airfields, shrublands, and suburban lawns. Beaches and dry pine barrens are also used. It rests, gives birth, and hibernates in underground burrow.

Breeding period is April-June. Gestation lasts 27-28 days. Litter size averages eight, perhaps larger in older females than in younger ones; with one litter per year. Young are weaned in 26 days, and emerge from the burrow about five weeks after birth. They sexually mature by their first spring. Although not colonial, it does prefer to live in loosely constituted families. Home ranges range from less than an acre to 12 acres; the male range is larger than that of the female (Gunderson 1976).

Diet consists of plant and animal foods: seeds, fruits, grasses, forbs, as well as insects. It may sometimes eat small vertebrates. Enters hibernation by October (adults may hibernate beginning in July), emerges in March or early April.
Generation Length (years):3

Threats [top]

Major Threat(s): There are no major threats to this species.

Conservation Actions [top]

Conservation Actions: This species is not of conservation concern and its range includes several protected areas.

Citation: Cassola, F. 2016. Ictidomys tridecemlineatus. The IUCN Red List of Threatened Species 2016: e.T42564A22263122. . Downloaded on 17 July 2018.
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