Snakes in Wyoming: identification guide and where to start looking
Yes, snakes are present in Wyoming, most commonly the prairie rattlesnake. Start your search in the eastern plains and butte country from late spring through early fall. Look for the distinctive rattle and triangular head to separate venomous from harmless species.
Yes, snakes are present in Wyoming, most commonly the prairie rattlesnake. Start your search in the eastern plains and butte country from late spring through early fall. Look for the distinctive rattle and triangular head to separate venomous from harmless species.
1. Which snake species are found in Wyoming?
Wyoming hosts about 11 snake species, but only the prairie rattlesnake (Crotalus viridis) is venomous. Other common species include the bullsnake, garter snake, smooth green snake, and milk snake. The bullsnake is often mistaken for a rattler due to its similar pattern and defensive hissing.
See ourstate wildlife pagefor the next step.
In Wyoming, snakes sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.
2. What are the most useful ID markers for Wyoming snakes?
Focus on head shape, scales, and tail. Venomous rattlesnakes have a broad triangular head and a blunt tail with a rattle. Harmless snakes have a more slender head and a pointed tail. Bullsnakes have keeled scales and a rounded head with a dark stripe from eye to jaw. Garter snakes have three light stripes running lengthwise.
3. Where in Wyoming do people usually notice snakes first?
Most sightings occur in the eastern half of the state, especially around the Powder River Basin, the Thunder Basin National Grassland, and the foothills of the Bighorn Mountains. Snakes are often seen on roads in the morning or late afternoon when they bask. The western mountains above 8,000 feet rarely have snakes.
See ourstate animal guidefor the next step.
4. What is the best season for snake sightings in Wyoming?
Late May through early October offers the best odds. Snakes emerge from hibernation in late April to May, with peak activity from June to August. Mornings (9–11 am) and late afternoons (4–6 pm) are prime times. During hot midday hours, they seek shade and are harder to spot.
5. How can you tell a prairie rattlesnake from a bullsnake?
Look for the rattle: a bullsnake lacks one and may hiss or vibrate its tail in dry leaves to mimic a rattler. The rattlesnake has a broader, arrow-shaped head and vertical pupil, while the bullsnake has a round pupil and a narrow head. Bullsnakes also have a prominent dark stripe from the eye to the jaw.
6. Are there any lookalike snakes in Wyoming that could confuse identification?
Yes, the bullsnake is the most common lookalike. Its pattern of dark blotches on a tan or cream background closely resembles a prairie rattlesnake’s. The desert striped whipsnake is another mimic with a similar color; however, it has smooth scales and a long, slender tail. Always check the head shape and rattle presence.
7. What should you do if you encounter a snake while hiking?
Stop and back away slowly. Do not attempt to handle or kill the snake. Give it at least 6 feet of space. Most bites happen when people try to move or provoke them. If you hear a rattle, freeze, locate the snake, and move away on a different path. For more on identifying snakes in the field, see our full guide tosnakes.
8. Where can I find snake identification resources and gear for field trips?
Once you know the basics, a field-friendly shirt helps you blend in while exploring. For comfortable hiking gear check out theRattlesnake Graphic T-Shirt.
### Rattlesnake Graphic T-Shirt
A durable cotton tee featuring a subtle rattlesnake design, ideal for long days in the field.Check Price and Availability
### Green Viper Snake T-Shirt
A bold green viper print for those who want a statement piece on snake country hikes.Check Price and Availability
For more apparel options, browse our full selection oft-shirts.
### Retro Cute Snake T-Shirt
A strong match for this wildlife page and an easy next click after the guide.Check Price and Availability
9. How common are snake bites in Wyoming?
Snake bites are rare in Wyoming. The state averages fewer than 10 reported rattlesnake bites per year, with almost no fatalities. Most bites occur when someone accidentally steps on or tries to handle a snake. Staying alert and keeping distance is the best prevention.
See ourtour planning ideasfor the next step.