At Critter Control of Southern Wisconsin, we often receive calls from homeowners who discover a snake in the yard, basement, or even the garage. While snakes may seem alarming at first, most of the species found in Wisconsin are harmless—and even beneficial to the local ecosystem. Still, understanding which snakes live in our area and how to handle unexpected encounters is essential for safety and peace of mind.
Common Snakes in Wisconsin
Wisconsin is home to over 20 species of snakes, most of which are non-venomous and shy. Here are some of the most commonly seen species in Southern Wisconsin:
Common Garter Snake (Thamnophis sirtalis)
Probably the most widespread snake in Wisconsin, the garter snake is easily recognizable with its long, slender body and three light-colored stripes running down its back. They prefer moist environments like gardens, meadows, and near water sources.
Eastern Fox Snake (Pantherophis vulpinus)
These large, non-venomous snakes are often mistaken for rattlesnakes due to their color pattern and tail-shaking behavior when threatened. However, fox snakes are harmless and play an important role in controlling rodent populations.
Dekay’s Brown Snake (Storeria dekayi)
A small, secretive snake, this species thrives in urban areas and gardens. Often found under leaf litter or debris, the brown snake feeds on slugs and insects and rarely grows longer than a foot.
Milksnake (Lampropeltis triangulum)
The milksnake has a striking red, black, and white pattern that can alarm homeowners, but it's completely harmless. These snakes are excellent at pest control and are often found near barns or wooded areas.
Venomous Snakes in Wisconsin
There are only two venomous snake species in the state, and both are rare in Southern Wisconsin:
Eastern Massasauga Rattlesnake (Sistrurus catenatus)
Federally listed as a threatened species, the massasauga is shy and reclusive, typically found in wetlands. Sightings are rare due to habitat loss and conservation efforts.
Timber Rattlesnake (Crotalus horridus)
More commonly found in the southwest regions of the state, timber rattlesnakes prefer remote forested bluffs. They are not aggressive and tend to avoid humans.
What to Do If You See a Snake
If you come across a snake in or near your home, follow these steps:
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Keep a safe distance. Most snakes will retreat if left alone.
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Do not try to handle it. Even non-venomous snakes can bite if provoked.
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Identify it from afar. Take a photo if possible—this can help professionals determine the species.
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Call a professional. At Critter Control of Southern Wisconsin, we provide humane snake removal and exclusion services to keep your home safe and snake-free.
Preventing Snake Encounters
To reduce the chances of encountering snakes on your property:
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Keep your lawn trimmed and free of tall grass or brush.
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Remove debris, wood piles, and rock piles where snakes may hide.
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Seal cracks in foundations and around doors or windows.
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Control rodent populations, as they attract many snake species.
When to Call Critter Control
While most snakes in Wisconsin are harmless, any unexpected wildlife in your home can be stressful. Whether you’re dealing with a persistent garter snake in the garden or an unknown visitor in your basement, Critter Control of Southern Wisconsin is here to help. Our trained professionals offer safe, effective, and humane snake removal services, along with exclusion work to keep your property protected year-round.