Know the dangerous ones
Venomous snakes in Jefferson County, Idaho
1 venomous snake species have verified records in Jefferson County. Learn to recognize each one, and know what to do if you are bitten.
Field entries
Crotalus oreganus Western RattlesnakeVenomousCrotalus oreganus
How to identify
Heavy body, broad triangular head, vertical (cat-like) pupils, and a segmented keratin rattle at the tail tip.
Occasionally seenFull profile →
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