|Scientific Name:||Thamnophis ordinoides (Baird & Girard, 1852)|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)|
Listed as Least Concern in view of its relatively wide distribution, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
|Range Description:||This species occurs in southwestern Canada and northwestern United States. Its range includes southwestern British Columbia, western Washington, western Oregon, and extreme northwestern California, including various coastal islands, at elevations from sea level to around 1,680 m (5,500 feet) (Nussbaum et al. 1981, Brown et al. 1995, Rossman et al. 1996, Ernst and Ernst 2003, Stebbins 2003).|
Native:Canada; United States
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by a very large number of occurrences (subpopulations) (see dot map in Nussbaum et al. 1981). The adult population size is unknown but certainly exceeds 100,000. This snake is common in many parts of its range. Its extent of occurrence, area of occupancy, number of subpopulations, and population size are probably relatively stable.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||This snake is primarily terrestrial but may be found near or occasionally in water; often it occurs in meadows, forest clearings, and along the edges of thickets (Nussbaum et al. 1983, Brown et al. 1995, Rossman et al. 1996, Ernst and Ernst 2003, Stebbins 2003). Hibernation sites include talus slopes or deep rock crevices.|
|Major Threat(s):||No major threats are known.|
|Conservation Actions:||Many occurrences are in protected areas.|
Brown, H.A., Bury, R.B., Darda, D.M., Diller, L.V., Peterson, C.R. and Storm, R.M. 1995. Reptiles of Washington and Oregon. Seattle Audubon Society, Seattle, Washington. viii + 176pp.
Ernst, C.H. and Ernst, E.M. 2003. Snakes of the United States and Canada. Smithsonian Books, Washington, D.C.
IUCN. 2007. 2007 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 12th September 2007).
Nussbaum, R.A., Brodie Jr., E.D. and Storm, R.M. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho. 332 pp.
Rossman, D.A., Ford, N.B. and Seigel, R.A. 1996. The Garter Snakes. University of Oklahoma Press, Norman, Oklahoma and London, UK.
Stebbins, R.C. 2003. A Field Guide to Western Reptiles and Amphibians. Third Edition. Houghton Mifflin Company, Boston, Massachusetts.
|Citation:||Hammerson, G.A. 2007. Thamnophis ordinoides. The IUCN Red List of Threatened Species 2007: e.T63985A12726329.Downloaded on 24 September 2018.|
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