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E., and D. M. Reeder (editors). 2005. Mammal species of the world: a taxonomic and geographic reference. Third edition. The Johns Hopkins University Press, Baltimore. 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Some individuals in Jackson Hole, Wyoming, migrate up to 97 kilometers annually (Adams 1982).","foodHabitsComments":"Much geographic and seasonal variation in diet. Primarily a grazer, but also consumes forbs (in summer, or in fall and winter in northern Great Plains region) and may browse on willow, aspen, oak, etc., where grasses are unavailable. Also commonly feeds on mushrooms, especially in late summer and fall (Great Basin Nat. 52:321).","animalPhenologyComments":"Active at night, but most active at dusk and dawn. Diurnal feeding is more common in summer than in winter. Feeding periods are more prolonged in winter, concentrated in morning and evening. 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Some individuals in Wyoming have annual migrations of up to 97 kilometers (Adams 1982). <br><br>Unsuitable habitat includes waters that do not freeze regularly, urban (not suburban) areas, and extremely rugged mountain ridges.","versionDate":"2004-09-22","versionAuthor":"Hammerson, G.","versionNotes":null,"lastModified":"2020-02-25T19:33:52.81546Z"}],"plantCharacteristics":null,"elementManagement":{"elementGlobalId":768964,"eoManagementGroupName":null,"stewardshipOverview":null,"impacts":null,"restorationPotential":null,"siteConservationPlansConsidered":null,"managementMethods":"See Thomas and Toweill (1982).","monitoringMethods":null,"managementProgramContacts":null,"monitoringProgramContacts":null,"managementResearchPrograms":null,"managementResearchNeeds":null,"biologicalResearchNeeds":null,"additionalTopics":null},"occurrenceViabilities":[{"eoRankSpecsDetailId":174154,"eoRankSpecsGroupName":null,"locationUseClass":{"id":1,"locationUseClassDescEn":"Not applicable","locationUseClassDescEs":"No se aplica","locationUseClassDescFr":"Sans objet","displayOrder":1},"excellentViability":null,"goodViability":null,"fairViability":null,"poorViability":null,"viabilityJustification":"Use the Generic Guidelines for the Application of Occurrence Ranks (2008).<br>The Key for Ranking Species Occurrences Using the Generic Approach provides a step-wise process for implementing this method.","versionDate":null,"versionAuthor":null,"versionNotes":null,"lastModified":"2020-05-14T05:19:17.131214Z"}],"references":[{"id":126388,"citation":"Adams, A. 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