Ammospermophilus leucurus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Sciuridae

Scientific Name: Ammospermophilus leucurus (Merriam, 1889)
Common Name(s):
English White-tailed Antelope Squirrel
Ammospermophilus insularis Nelson & Goldman, 1909
Taxonomic Notes: A. insularis is now considered a subpopulation of this species on Spirito Santo Island (Alvarez-Castaneda 2007).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-09-01
Assessor(s): Linzey, A.V., Timm, R., Álvarez-Castañeda, S.T., Castro-Arellano, I. & Lacher, T.
Reviewer(s): Amori, G.
This species is listed as Least Concern in view of its wide distribution, presumed large population, and because it does not appear to be under threat and is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Extends from south-eastern Oregon and south-western Idaho east to western Colorado and north-western New Mexico (United States), and south through Baja California and Baja California Sur (Mexico). It also occurs on the islands of San Marcos and Espiritu Santo (Gulf of California).
Countries occurrence:
Mexico (Baja California, Baja California Sur); United States (Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, Utah)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Widespread and fairly common. However, in San Marcos island there are only three known locations for this species.

Recorded population densities range from 0.06 individuals/ha in late spring to 0.35 individuals/ha in autumn. There are multi-annual fluctuations in numbers.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It occupies desert habitats from valley floors to the juniper belt. Found in shrubby areas with sandy or rocky soil.
Generation Length (years):3

Threats [top]

Major Threat(s): No major threats known to the species as a whole.

However, the populations of this species may be threatened on the two islands in the Gulf of California by predation from feral cats and by human activities.

Conservation Actions [top]

Conservation Actions: There are no known conservation measures specific to this species. However, there are several protected areas within its range.

The population on Espiritu Santo is considered Endangered by the Mexican government (NOM-059-ECOL-2001).

Errata [top]

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

Classifications [top]

1. Forest -> 1.5. Forest - Subtropical/Tropical Dry
3. Shrubland -> 3.4. Shrubland - Temperate
8. Desert -> 8.2. Desert - Temperate

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over entire range
In-Place Species Management
In-Place Education

Bibliography [top]

Alvarez-Castaneda, S. T. 2007. Systematics of the antelope ground squirrel (Ammospermophilus) from islands adjacent to the Baja California peninsula. Journal of Mammalogy 88: 1160-1169.

Belk, M. C. and Smith, H. S. 1991. Ammospermophilus lecurus. Mammalian Species 368: 1-8.

Best, T. L., Ceasar, K., Titus, A. S. and Lewis, C. L. 1990. Ammospermophilus insularis. Mammalian Species 364: 1-4.

Hoffmann, R.S. and Thorington, R.J. 2005. Family Sciuridae. In: E. Wilson and D.M. Reeder (eds), Mammal Species of the World, pp. 754-818. John Hopkins University Press, Baltimore, Maryland, USA.

IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-3. Available at: (Accessed: 07 December 2016).

IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-1. Available at: (Accessed: 27 April 2017).

Pacifici, M., Santini, L., Di Marco, M., Baisero, D., Francucci, L., Grottolo Marasini, G., Visconti, P. and Rondinini, C. 2013. Generation length for mammals. Nature Conservation 5: 87–94.

Wilson, D.E. and Reeder, D.M. 2005. Mammal Species of the World. Johns Hopkins University Press, Baltimore, MD, USA.

Wilson, D.E. and Ruff, S. 1999. The Smithsonian Book of North American Mammals. Smithsonian Institution Press, Washington, DC, USA.

Citation: Linzey, A.V., Timm, R., Álvarez-Castañeda, S.T., Castro-Arellano, I. & Lacher, T. 2016. Ammospermophilus leucurus (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T42452A115189458. . Downloaded on 20 May 2018.
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