INL Mammal Species List

Species Distribution Seasonal Occurrence Abundance Remarks
Order INSECTIVORA Return to Top
Family Soricidae
Merriam Shrew
(Sorex merriami)
Sitewide Resident Uncommon
Order CHIROPTERA Return to Top
Family Vespertilionidae
California Myotis
(Myotis californicus)
Sitewide Unknown Unknown
Little Brown Myotis
(Myotis lucifugus)
Sitewide Unknown Unknown
Townsend's Big-eared Bat
(Corynorhinus townsendii)
Sitewide Unknown Unknown
Order LAGOMORPHA        
Family Leporidae        
White-tailed Jack Rabbit
(Lepus townsendii)
Sitewide Resident Uncommon
Black-tailed Jack Rabbit
(Lepus californicus)
Sitewide Resident Abundant Cyclic population
Mountain Cottontail
(Sylvilagus nattallii)
Sitewide Resident Abundant
Pygmy Rabbit
(Brachylagus idahoensis)
Sagebrush /Grassland Resident Abundant
Order RODENTIA       Return to Top
Family Sciuridae        
Yellow-bellied Marmot
(Marmota flaviventris)
Sitewide Resident Uncommon Rocky areas
Townsend's Ground Squirrel 
(Spermophilus townsendii)
Sitewide Resident Common Estivates - likely to be observed only in April-June
Least Chipmunk
(Tamias minimus)
Sitewide Resident Common
Family Geomyidae        
Northern Pocket Gopher
(Thomomys talpoides)
Sitewide Resident Uncommon
Family Heteromyidae        
Great Basin Pocket Mouse
(Perognathus parvus)
Sitewide Resident Common
Ord's Kangaroo Rat
(Dipodomys ordii)
Sitewide Resident Common
Family Castoridae        
Beaver
(Castor canadensis)
Aquatic Summer
Winter
Uncommon
Uncommon
Family Cricetidae        
Western Harvest Mouse
(Reithrodontomys megalotis)
Sitewide Resident Common
Deer Mouse
(Peromyscus maniculatus)
Sitewide Resident Abundant
Northern Grasshopper Mouse 
(Onychomys leucogaster)
Sitewide Resident Uncommon
Bushy-tailed Woodrat
(Neotoma cinerea)
Sitewide Resident Common Basalt outcroppings
Meadow Vole
(Microtus pennsylvanicus)
Sitewide Resident Uncommon Cyclic
Montane Vole
(Microtus montanus)
Sitewide Resident Common Cyclic
Sagebrush Vole
(Lagurus curtatus)
Sitewide Resident Uncommon
Muskrat
(Ondatra zibethicus)
Aquatic Summer
Winter
Uncommon
Uncommon
Family Muridae       Return to Top
Norway Rat
(Rattus norvegicus)
Agricultural Resident Uncommon
House Mouse
(Mus musculus)
Agricultural
Facilities
Resident Uncommon
Family Erythizontidae        
Porcupine
(Erethizon dorsatum)
Riparian
Juniper
Summer
Winter
Uncommon
Uncommon
Order CARNIVORA       Return to Top
Family Canidae        
Coyote
(Canis latrans)
Sitewide Resident Common
Family Mustelidae        
Long-tailed Weasal
(Mustela frenata)
Sitewide Resident Common
Badger
(Taxidea taxus)
Sitewide Resident Common
Spotted Skunk
(Spilogale gracilis)
Sitewide Resident Uncommon Usually near basalt outcroppings
Family Felidae        
Mountain Lion
(Felis concolor)
Sitewide Transient1 Rare
Bobcat
(Lynx rufus)2
Sitewide Resident Uncommon
Order ARTIODACYLA       Return to Top
Family Cervidae        
Elk
(Cervus elaphus)
Sitewide Resident Common
Mule Deer
(Odocoileus hemionus)
Sitewide Resident Uncommon
Moose
(Alces alces)
Sitewide Transient2 Rare
Family Antilocapridae        
Pronghorn
(Antilocapra americana)
Sitewide Resident Abundant
Family Bovidae        
Mountain Sheep
(Ovis canadensis)
Sagebrush/ Grassland Unknown Accidental Only reported from northern portion of INL

POSSIBLE OCCURRENCE

Order CHIROPTERA       Return to Top
Family Vespertilionidae        
Small-footed Myotis
(Myotis subulatus)
Sitewide
Yuma Myotis
(Mytois yumanensis)
Sitewide
Long-legged Myotis
(Myotis volans)
Sitewide
Fringed Myotis
(Mytois thysanodes)
Sitewide
Long-eared Myotis
(Myotis evotis)
Sitewide
Silver-haired Bat
(Lasionycteris noctivagans)
Sitewide
Western Pipistrel
(Pipistrellus hesperus)
Sitewide
Big Brown Bat
(Eptesicus fascus)
Sitewide
Hoary Bat
(Nycteris cinerea)
Sitewide
Pallid Bat
(Antrozous pallidus)
Sitewide
Order CARNIVORA       Return to Top
Family Procyonidae        
Racoon
(Procyon lotor)
Agricultural
Riparian
Family Mustelidae    
Short-tailed Weasel (Ermine)
(Mustela erminea)
Agricultural
Riparian
Striped Skunk
(Mephitis mephitis)
Agricultural
Riparian
Family Canidae        
Red Fox
(Vulpes vulpes)
Agricultural
Riparian

1  Occurs on the INL for a relatively short time, usually during seasonal migration or dispersal
2  Jones et al. (1979) list this species as Felis rufus