A field guide, state by state
Snakes and spiders of every U.S. state
Which snakes and spiders live where you are, which of them are venomous, where in the state and in which months they turn up. Built from 619,071 licensed wildlife records.
Find your state
Every state with its venomous snakes and dangerous spiders (widows and recluses) counted by species. Arizona has the most venomous snakes, 14; Alaska, Hawaii, Maine, New Hampshire and Rhode Island list none. GBIF still holds a few venomous snake records for three of them, too few to list: Hawaii (pelagic sea snake: 5 records), Maine (timber rattlesnake: 3 records) and New Hampshire (timber rattlesnake: 2 records).
Bitten? Call 911 for a venomous snakebite or any bite with trouble breathing. For advice on any bite or sting, call Poison Help at 1-800-222-1222 (free, 24/7, U.S.-wide). Do not cut the wound, suck out venom or use a tourniquet. General information, not medical advice. Do not handle or try to identify a snake or spider by this page; if unsure, treat it as venomous.
Browse by animal
The venomous species recorded most often
Western rattlesnakeCrotalus oreganusvenomous
Eastern copperheadAgkistrodon contortrixvenomous
Western diamondback rattlesnakeCrotalus atroxvenomous
Prairie rattlesnakeCrotalus viridisvenomous
Northern cottonmouthAgkistrodon piscivorusvenomous
SidewinderCrotalus cerastesvenomous
Timber rattlesnakeCrotalus horridusvenomous
Mohave rattlesnakeCrotalus scutulatusvenomous