Illinois records
Timber Rattlesnake in Illinois
VenomousCrotalus horridus
Yes. The Timber Rattlesnake has been recorded in 13 Illinois 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.)
Illinois counties with Timber Rattlesnake records
13 listedSee the full Timber Rattlesnake profile or all snakes in Illinois.