Species Evaluations & Rationales - Mammals

Species occurrence on National Forest System units as portrayed by these tables is based on limited information available to evaluators at the time of preparation of species evaluations. Because these evaluations were intended to be sketches and not exhaustive, and because distribution information for many species is inadequate, the accuracy of these location tables cannot be ensured. Therefore, users must assume the responsibility of verifying that this information is accurate for individual forests.

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Recommendation: R2 Sensitive Species
The current Regional Forester sensitive mammals and their evaluations are on the "Sensitive Species List" page.
Recommendation: Not R2 Sensitive Species, But Should Be Considered For Other Emphasis Species Lists
Abert's squirrel
Sciurus aberti
Evaluation Rationale
Allen's thirteen-lined ground squirrel
Spermophilus tridecemlineatus alleni
Evaluation Rationale
American pika
Ochotona princeps
Evaluation Rationale
Bear Lodge meadow jumping mouse
Zapus hudsonius campestris
Evaluation Rationale
Bighorn Mountain pika
Ochotona princeps obscura
Evaluation #1 | Evaluation #2 Rationale
Cliff chipmunk
Tamias dorsalis
Evaluation Rationale
Northern myotis
Myotis septentrionalis
Evaluation Rationale
Pallid bat
Antrozous pallidus
Evaluation Rationale
Plains pocket mouse subsp
Perognathus flavescens relictus
Evaluation Rationale
Plains spotted skunk
Spilogale putorius interrupta
Evaluation Rationale
Ringtail
Bassariscus astutus
Evaluation Rationale
Rocky Mountain elk
Cervus elaphus nelsoni
Evaluation Rationale
Silver-haired bat
Lasionycteris noctivagans
Evaluation Rationale
Wet Mountains marmot
Marmota flaviventris notioros
Evaluation Rationale
Yuma myotis
Myotis yumanensis
Evaluation Rationale
Recommendation: Not R2 Sensitive Species and Not of Concern
Allen's big-eared bat
Idionycteris phyllotis
Evaluation Rationale
American bison
Bos bison
Evaluation Rationale
American black bear
Ursus americanus
Evaluation Rationale
Arctic shrew
Sorex arcticus
Evaluation Rationale
Bailey's eastern woodrat
Neotoma floridana baileyi
Evaluation Rationale
Big free-tailed bat
Nyctinomops macrotis
Evaluation Rationale
Botta's pocket gopher subsp
Thomomys bottae rubidus
Evaluation Rationale
Brazilian free-tailed bat
Tadarida brasiliensis
Evaluation Rationale
Dwarf shrew
Sorex nanus
Evaluation Rationale
Eastern chipmunk
Tamias striatus
Evaluation Rationale
Eastern cottontail
Sylvilagus floridanus
Evaluation Rationale
Eastern mole
Scalopus aquaticus
Evaluation Rationale
Fisher
Martes pennanti
Evaluation Rationale
Gray fox
Urocyon cinereoargenteus
Evaluation Rationale
Hayden's shrew
Sorex haydeni
Evaluation Rationale
Hispid pocket mouse
Chaetodipus hispidus
Evaluation Rationale
Idaho pocket gopher
Thomomys idahoensis
Evaluation Rationale
Least shrew
Cryptotis parva
Evaluation Rationale
Least weasel
Mustela nivalis
Evaluation Rationale
Long-eared myotis
Myotis evotis
Evaluation Rationale
Long-legged myotis
Myotis volans
Evaluation Rationale
Merriam's shrew
Sorex merriami
Evaluation Rationale
Northern flying squirrel
Glaucomys sabrinus
Evaluation Rationale
Northern pocket gopher subsp
Thomomys talpoides agrestis
Evaluation Rationale
Piñon mouse
Peromyscus truei
Evaluation Rationale
Plains harvest mouse
Reithrodontomys montanus
Evaluation Rationale
Plains pocket mouse
Perognathus flavescens
Evaluation Rationale
Preble's shrew
Sorex preblei
Evaluation Rationale
Cougar
Puma concolor
Evaluation Rationale
Pygmy rabbit
Brachylagus idahoensis
Evaluation Rationale
Sagebrush vole
Lemmiscus curtatus
Evaluation Rationale
Silky pocket mouse
Perognathus flavus
Evaluation Rationale
Southern bog lemming
Synaptomys cooperi
Evaluation Rationale
Spotted ground squirrel
Spermophilus spilosoma
Evaluation Rationale
Water shrew
Sorex palustris
Evaluation Rationale
Western small-footed myotis
Myotis ciliolabrum
Evaluation Rationale
Western spotted skunk
Spilogale gracilis
Evaluation Rationale
White-footed mouse
Peromyscus leucopus
Evaluation Rationale
Species Removed From the List by Policy Due to a Regulatory Change
Preble's meadow jumping mouse (Zapus hudsonius preblei, Wyoming occurrence) - Endangered Species Act protections restored on 08/06/2011
North American wolverine (lower 48 DPS) (Gulo gulo luscus) - Proposed threatened 02/04/2013