Western Gray Squirrel
Sciurus griseus · Mammal, Vertebrate, Warm-blooded, Wild
Animal Family
Family Sciuridae, order Rodentia, class Mammalia
Animal Category
Wild Prey
Breed / Variety
Western Gray Squirrel (Sciurus griseus griseus)
Conservation Status
IUCN Red List status is Least Concern, with a stable to locally declining population trend primarily threatened by habitat fragmentation and competition with introduced non-native squirrel species.
About This Creature
A medium to large tree squirrel with a silver-gray upper body, contrasting white underparts, and a very bushy tail frosted with white hairs. Total length ranges from 45 to 60 cm including the long tail, and weight generally varies from 400 to 1,000 grams.
Physical Characteristics
Robust body structure, short curved claws for climbing, large bushy tail used for balance and communication, rounded head with prominent dark-edged ears, large dark eyes, long whiskers, and powerful hind legs.
Behavior & Temperament
Solitary and diurnal animals that are active primarily during daylight hours. They communicate through vocal chatters and tail flicks, build large nests called dreys in trees, and forage extensively on the ground and in tree canopies.
Habitat & Diet
Origin Region
Western North America, from Washington down through Oregon and California into northern Baja California, Mexico.
Habitat
Forest and Woodland, specifically oak and pine-oak woodlands, Terrestrial and Arboreal
Diet & Nutrition
Omnivore, though primarily granivore and frugivore, feeding heavily on acorns, pine nuts, tree seeds, berries, fungi, and occasionally insects or bird eggs.
Lifespan & Health
Typically lives 6 to 7 years in the wild, up to 10-12 years in captivity. Subject to predation by raptors, coyotes, bobcats, and foxes, as well as disease and vehicle strikes.
Special Characteristics
Exceptional agility and leaping ability in trees, excellent spatial memory for locating buried food caches (scatter-hoarding), and a bushy tail that acts as a sunshade, umbrella, and balance organ.
Ecological Information
Acts as an important seed disperser through scatter-hoarding, helping regenerate oak and pine forests, and serves as a vital prey species for various woodland carnivores and raptors.