Fauna
Mammal

Western Gray Squirrel

Sciurus griseus

Also known as Silver-gray Squirrel, California Gray Squirrel, Oregon Gray Squirrel, Columbian Gray Squirrel

Western gray squirrels navigate the mixed conifer and oak canopies of Pacific coastal forests, utilizing their immense, silver-frosted tails for balance and communication. Unlike non-native competitors, they rely heavily on subterranean fungi and hypogeous mycorrhizal truffles, playing a vital ecological role in forest health through spore dispersal. They construct large, spherical stick nests called dreys high in mature trees, where females rear a single litter of pups each spring.

ArborealDiurnalNative Rodent
Western Gray Squirrel reference1 / 7
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyHypogeous truffles, Acorns, Pine seeds
Predators
  • Red-tailed Hawk
  • Bobcat
  • Coyote
ThreatsHabitat fragmentation, competition from invasive squirrels, road mortality, disease
HabitatsOak-pine woodlands, mixed conifer forests, riparian corridors
Life span7–11 years
Classification
  1. OrderRodentia
  2. FamilySciuridae
  3. GenusSciurus
  4. SpeciesSciurus griseus
Range & activity
Native
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Can inflict a sharp defensive bite if cornered or handled; observe quietly from a distance.
Why it is dangerous
Possesses formidable incisors built for cracking tough nutshells that can deliver deep puncture wounds.
How to recognize a risky encounter
Recognizable by uniform gunmetal-gray fur, crisp white underparts, and an exceptionally long, silver-frosted tail.
What to do
Do not attempt to touch, feed by hand, or corner; keep a respectful distance and let the animal retreat.
Responsible observation
  • Quiet approach: Move slowly through oak groves in early morning to catch them foraging on the ground.
  • Look up: Search the upper canopy of mature trees for bulky stick dreys lined with shredded bark.
  • Listen for alarms: Listen for a sharp, hollow barking call that warns of approaching ground predators.
Related species
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