Venomous animals in Idaho

Venomous species living here
31 venomous snake, 1 venomous spider, 1 scorpion

The ones that need the most respect: western rattlesnake. A bite from any of them is a medical emergency.

Dangerous: 1Medically significant: 1Painful, rarely serious: 1
  • 1 dangerous
  • 1 medically significant
  • 1 painful, rarely serious
Venomous snakes
1
Venomous spiders
1
Scorpions
1
Centipedes
0
Open records
261
Counties with any record
24

Where they turn up in Idaho

Lincoln: Western rattlesnakeCuster: Northern scorpionJefferson: Western rattlesnakeGem: Western rattlesnakeIdaho: Western rattlesnakeCassia: Western rattlesnakeBlaine: Black widow, Western rattlesnakeGooding: Western rattlesnakeOneida: Black widowBoise: Western rattlesnakeBonneville: Western rattlesnakeJerome: Western rattlesnakeElmore: Tiger centipede, Western rattlesnakeBannock: Black widow, Western rattlesnakeNez Perce: Western rattlesnakeTwin Falls: Western rattlesnakeButte: Western rattlesnakeAdams: Western rattlesnakeLatah: Western rattlesnakeOwyhee: Northern scorpion, Western rattlesnakeBingham: Western rattlesnakeWashington: Western rattlesnakeAda: Black widow, Tiger centipede, Western rattlesnakeCanyon: Black widow, Western rattlesnake
Number of venomous species with open GBIF records in each county. Blank counties often mean nobody has posted a record yet, not that nothing lives there.

Venomous snakes in Idaho

Venomous snakes in Idaho: map, photos and look-alikes

Venomous spiders in Idaho

Venomous spiders in Idaho: map, photos and look-alikes

Scorpions in Idaho

Scorpions in Idaho: map, photos and look-alikes

When they are out

Jan: 2 records (venomous snake)Jan: 2 records (spider)JanFeb: 1 records (spider)FebMarApr: 48 records (venomous snake)Apr: 1 records (spider)AprMay: 45 records (venomous snake)May: 2 records (spider)MayJun: 77 records (venomous snake)Jun: 2 records (spider)Jun: 2 records (scorpion)JunJul: 40 records (venomous snake)JulAug: 16 records (venomous snake)Aug: 3 records (spider)AugSep: 16 records (venomous snake)Sep: 3 records (spider)SepOct: 8 records (venomous snake)Oct: 3 records (spider)OctNovDec
Open records by month; most fall in April to June. People record animals when they are outdoors too, so winter looks quieter than it may be.

Recorded, but not living here

A rare record means someone found or reported the animal once or a few times, but there is no known population. Many are strays, pets or hitchhikers in cargo.

Harmless look-alikes in Idaho

Quick answers for Idaho

Questions

How many venomous snakes live in Idaho?

1 species: Western rattlesnake.

Are there brown recluse spiders in Idaho?

No. There are no open records of the brown recluse from Idaho, and the state is outside its range.

Are there scorpions in Idaho?

Yes: Northern scorpion.

When are venomous animals most active in Idaho?

Most open records from Idaho fall in April to June. Records follow when people are outdoors too, so treat this as a guide, not a rule.

What should I do after a bite or sting?

Call 911 for any venomous snakebite or a severe reaction. For spider bites and scorpion stings, call Poison Control at 1-800-222-1222, free and open 24/7.

Neighboring states