Great Basin Rattlesnake
Crotalus lutosus
A pale, desert-adapted rattlesnake of the arid Great Basin, blending well with sandy and rocky terrain.
- Venomous?
- Venomous
- Adult length
- 0.6-1.1 m (2-3.6 ft)
- Range
- Great Basin region of the western United States
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Overview
The Great Basin Rattlesnake is a member of the western rattlesnake group adapted to the cold-desert conditions of the Great Basin. Its light coloration helps it blend into the sagebrush steppe and rocky substrates typical of its range.
It is an important predator of small mammals in its ecosystem and is generally reclusive, avoiding human contact when possible.
How to identify it
- Pale gray, tan, or yellowish-brown background color
- Dark brown or gray dorsal blotches, often faded or washed out compared to related subspecies
- Blotches may become banded toward the tail
- Broad triangular head with elliptical pupils
- Segmented rattle
- Differentiated from other western rattlesnakes mainly by paler coloration and range
Habitat & range
Inhabits sagebrush flats, rocky canyons, and high desert basins throughout Nevada, Utah, Idaho, and adjacent states. Found from valley floors up into pinyon-juniper woodlands and rocky foothills, often near rodent burrow systems.
Behavior, diet & reproduction
Active mainly at dusk and during the night in hot months, shifting to daytime activity in cooler seasons. Preys on small rodents and occasionally lizards. Gives birth to live young in late summer. Uses rattling as a primary defense, striking only when cornered or provoked.
Frequently asked questions
Is the Great Basin Rattlesnake the same as the Northern Pacific Rattlesnake?
They are closely related members of the western rattlesnake complex but differ in coloration and geographic range.
Where is it commonly found?
Throughout the Great Basin desert region including Nevada, Utah, and parts of Idaho and Oregon.
Is it aggressive?
No, it is generally shy and prefers to avoid confrontation, relying on camouflage and rattling as first defenses.
What time of year are young born?
Typically in late summer, as this species bears live young rather than laying eggs.
Great Basin Rattlesnake guides
In-depth guides for identifying and understanding Great Basin Rattlesnake.
Great Basin Rattlesnake identified by the community
Real snakes identified with Snake Identifier.
