Fauna
Plant

Western Juniper

Juniperus occidentalis

Also known as Sierra Juniper

Western juniper thrives across the arid plateaus and rocky slopes of the Great Basin and Pacific Northwest, often developing massive, twisted trunks and flattened crowns on wind-scoured ridges. Its resinous, bluish seed cones take two years to mature and provide critical winter nutrition for sagebrush birds like Townsend's solitaires. Long-term fire suppression has allowed this slow-growing conifer to expand into open rangelands, reshaping regional hydrology and sagebrush steppe ecology.

EvergreenDrought-TolerantLong-Lived
Western Juniper reference1 / 7
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyPhotoautotrophic (sunlight, carbon dioxide, water, and soil minerals)
ThreatsSevere wildfire, rangeland clearing initiatives, and changing precipitation regimes
HabitatsArid rocky slopes, sagebrush steppe, dry plateau woodlands, and montane forests
Life span1,000–1,600+ years
Classification
  1. OrderPinales
  2. FamilyCupressaceae
  3. GenusJuniperus
  4. SpeciesJuniperus occidentalis
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Foliage and cones are toxic to pets and livestock; wild berries have toxic look-alikes, never ingest.
Why it is dangerous
Contains isocupressic acid and volatile terpene oils that induce toxic abortion in cattle and cause severe digestive upset and kidney strain in dogs.
How to recognize a risky encounter
Look for scale-like evergreen foliage, fibrous reddish bark, and powdery blue berry-like cones with a white waxy coating.
What to do
Do not allow grazing livestock or curious domestic pets to browse foliage or eat fallen cones.
Responsible observation
  • Aroma: Crush a small scale-like leaf between your fingers to experience its pungent, resinous cedar scent.
  • Bark Identification: Look for distinctive reddish-brown bark that shreds into long, fibrous vertical strips on mature trunks.
  • Birding Clues: Scan the canopy during winter months to spot feeding solitaires and waxwings defending cone-rich feeding territories.
Related species
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