Colorado records
Western Rattlesnake in Colorado
VenomousCrotalus oreganus
Yes. The Western Rattlesnake has been recorded in 11 Colorado counties. It is venomous. Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
If you are bitten
Rattlesnake bites are medically serious. Expect intense pain, rapid swelling, and bruising. Stay calm, keep the bitten limb still and roughly level with the heart, remove rings and tight clothing, and get to an emergency room immediately. Do NOT apply a tourniquet, cut the wound, apply ice, or try to suck out venom. Call Poison Control at 1-800-222-1222 or 911 in the US, or your local emergency number. (Source: CDC.)
Colorado counties with Western Rattlesnake records
11 listedSee the full Western Rattlesnake profile or all snakes in Colorado.