Fauna
Reptile

Great Basin Rattlesnake

Crotalus lutosus

Also known as Great Basin Pit Viper

Great Basin rattlesnakes thrive across arid sagebrush steppes and rocky canyons, relying on subtle blotched patterns to blend seamlessly into desert soils. During cold winters, dozens or even hundreds congregate in underground communal dens to survive the freeze before dispersing across great distances each spring. When threatened, they coil tightly, vibrate their segmented tail rattle as a warning, and use heat-sensing facial pits to locate prey or potential threats in total darkness.

VenomousReptileDesert-Dweller
Great Basin Rattlesnake reference
Morgan Hansen / CC BY 4.0 · cc-by
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyOrd's Kangaroo Rat, Deer Mouse, Side-blotched Lizard
Predators
  • Red-tailed Hawk
  • Coyote
  • California Kingsnake
ThreatsHabitat fragmentation, road mortality, direct human persecution
HabitatsSagebrush steppe, desert scrub, rocky slopes, pinyon-juniper woodland
Life span15–20 years
Classification
  1. FamilyViperidae
  2. GenusCrotalus
  3. SpeciesCrotalus lutosus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskVery high
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is very high
Delivers a venomous bite if threatened; maintain a respectful distance of at least two meters.
Why it is dangerous
Possesses potent hemotoxic venom that causes severe localized tissue damage, intense pain, and dangerous swelling.
How to recognize a risky encounter
Look for a triangular head, vertical slit pupils, tan ground color with dark brown blotches, and a tail rattle.
What to do
Never handle or corner this snake; freeze upon visual contact and step away slowly.
Responsible observation
  • Watch Your Step: Scan trail edges carefully and avoid placing hands or feet into unlit rock crevices.
  • Listen Closely: Freeze immediately if you hear a dry, buzzing rattle to locate the snake's position.
  • Give Space: Back away slowly, keeping a minimum distance of three meters at all times.
Related species
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Desert Sands

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