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You are here >1Up Info > Wildlife, Animals, and Plants > Wildlife Species > Mammals > Wildlife Species: Spermophilus townsendii | Townsend's Ground Squirrel
 

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WILDLIFE DISTRIBUTION AND OCCURRENCE

WILDLIFE SPECIES: Spermophilus townsendii | Townsend's Ground Squirrel
GENERAL DISTRIBUTION : The Townsend's ground squirrel is distributed in the Great Basin and the Columbia Plateau. Its range includes south-central Washington, eastern Oregon, southern Idaho, western Utah, most of Nevada, and extreme eastern California [25]. Distribution of subspecies is [9]: Spermophilus townsendii artemesiae - south-central Idaho S. t. canus - eastern Oregon; northeastern corner of California; northwestern corner of Nevada S. t. idahoensis - southwestern Idaho S. t. mollis - eastern California; southeastern Oregon; southern Idaho; western Utah; Nevada; most widely distributed subspecies S. t. nancyae - south-central Washington S. t. townsendii - south-central Washington S. t. vigilis - Snake River Canyon bottomlands of east-central Oregon and west-central Idaho ECOSYSTEMS : FRES29 Sagebrush FRES30 Desert shrub STATES :
CA ID NV OR UT WA
BLM PHYSIOGRAPHIC REGIONS : 5 Columbia Plateau 6 Upper Basin and Range 7 Lower Basin and Range KUCHLER PLANT ASSOCIATIONS : K038 Great Basin sagebrush K055 Sagebrush steppe K056 Wheatgrass-needlegrass shrubsteppe K040 Saltbush-greasewood SAF COVER TYPES : NO-ENTRY SRM (RANGELAND) COVER TYPES : 104 Antelope bitterbrush-bluebunch wheatgrass 105 Antelope bitterbrush-Idaho fescue 314 Big sagebrush-bluebunch wheatgrass 315 Big sagebrush-Idaho fescue 401 Basin big sagebrush 402 Mountain big sagebrush 403 Wyoming big sagebrush 414 Salt desert shrub 422 Riparian 501 Saltbush-greasewood PLANT COMMUNITIES : Townsend's ground squirrels typically inhabit arid grasslands and shrub-grasslands. Malheur ground squirrels, however, inhabit the relatively mesic and fertile Snake River Valley [25]. Plant communities in which Townsend's ground squirrels occur that have not been previously listed include crested wheatgrass (Agropyron cristatum), big sagebrush (Artemisia tridentata)-crested wheatgrass [15], and rabbitbrush (Chrysothamnus spp.)-, shadscale (Atriplex confertifolia)-, and winterfat (Kraschenninikovia lanata)-bunchgrasslands [21]. Yensen and others [28] found that on the Snake River Birds of Prey Study Area (SRBPSA) of southeastern Idaho, density of active Townsend's ground squirrel burrows was highest on winterfat-Sandberg bluegrass (Poa secunda), intermediate in big sagebrush-Thurber needlegrass (Stipa thurberiana), and lowest in shadscale-Indian ricegrass (Oryzopsis hymenoides)-needle-and-thread grass (Stipa comata) communities. Burrow densities were highly variable in mixed exotic annual communities, and negatively correlated with cheatgrass (Bromus tectorum) communities. Another study on the SRBPSA showed that Townsend's ground squirrel density generally increased with increasing native grass cover. Populations were unstable when native grass cover was extremely high, however [16]. REFERENCES : NO-ENTRY

Related categories for Wildlife Species: Spermophilus townsendii | Townsend's Ground Squirrel

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Information Courtesy: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Fire Effects Information System

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