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Tamias ochrogenys

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA MAMMALIA RODENTIA SCIURIDAE

Scientific Name: Tamias ochrogenys
Species Authority: (Merriam, 1897)
Common Name/s:
English Yellow-cheeked Chipmunk
Taxonomic Notes: Elevated to full species status (from subspecies of T. townsendii) by Sutton and Nadler (1974). Full species status of ochrogenys was rejected by Levenson and Hoffmann (1984) and Jones et al. (1986). See Gannon and Lawlor (1989) for vocalization information supporting recognition of ochrogenys as a distinct species. Jones et al. (1992) and Hoffmann et al. (in Wilson and Reeder 1993) accepted T. ochrogenys as a distinct species.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor/s: Linzey, A.V. & NatureServe (Hammerson, G.)
Reviewer/s: Amori, G., Koprowski, J. & Roth, L. (Small Nonvolant Mammal Red List Authority)
Justification:
Listed as Least Concern, although its extent of occurrence is less than 20,000 km², it is common within its very restricted range, and there are no major threats at present.

Geographic Range [top]

Range Description: The species' range encompasses the northwest coast of California in the United States, from the south side of the Eel River, Humboldt County, to about three kilometres north of Bodega and Freestone, Sonoma County, and inland no more than 40 kilometres from the coast, at elevations from sea level to at least 1,280 m asl (Gannon et al. 1993).
Countries:
Native:
United States (California)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is apparently secure in its range and is locally common (NatureServe). The total adult population size is unknown but presumably far exceeds 10,000. It is represented by at least several dozen occurrences or subpopulations. Extent of occurrence, area of occupancy, number of subpopulations, and population size probably are relatively stable.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Habitat includes dense undergrowth at the edge of humid coastal redwood and mixed coniferous forests (Adams 1967); this is primarily an inhabitant of the Transition life zone (Grinnell 1933). Probably breeds in spring and produces one litter of 4-6 young between May and June. Predators include weasels, mink, and owls. Diet includes seeds, fruit, fungi, insects, etc., depending on availability. It is active throughout most of the year. Probably remains in its burrow only during severe winter storms.
Systems: Terrestrial

Threats [top]

Major Threat(s): No major threats to this species have been identified.

Conservation Actions [top]

Conservation Actions: This species is not of conservation concern and there are a few protected areas within its range.
Citation: Linzey, A.V. & NatureServe (Hammerson, G.) 2008. Tamias ochrogenys. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 21 April 2014.
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