States Wildlife

Michigan Snakes: Identification Guide With Pictures

Last checked November 3, 2026 against official sources.

On this page
  1. Venomous snakes
  2. The other 17 snakes
  3. Lookalikes
  4. When they are active
  5. If you are bitten or stung
  6. How to report
  7. Common questions
  8. What official sources say
  9. About this list
  10. Sources

Michigan Department of Natural Resources: Eighteen species of snakes are found in Michigan

This page lists 18 snakes. 1 is venomous by official accounts: Eastern Massasauga Rattlesnake.

Venomous snakes in Michigan

Official sources label these snakes venomous in Michigan. Venomous snakes in Michigan has more on each one.

Eastern Massasauga Rattlesnake
Photo: User:Rstanton13 · CC BY-SA 4.0 · Wikimedia Commons · resized

Eastern Massasauga Rattlesnake

Sistrurus catenatus

Venomous per Michigan Department of Natural Resources

Danger to people
“The eastern massasauga rattlesnake is Michigan’s only venomous native snake. The snake’s bite is painful but extremely unlikely to be fatal.” Michigan Department of Natural Resources
Size
Usually 18 to 30 inches long (New York DEC: 18 to 40 inches, average 27.5). The western massasauga in Arizona reaches only about 22 inches.
How to recognize it
  • A segmented rattle (a single button in newborns) and vertical, catlike pupils. In Michigan it is the only snake with both.
  • Nine large plates on top of the head (the timber rattlesnake has many small scales there)
  • A heat-sensing pit on each side of the head between the eye and nostril; the head is flat and much wider than the neck
Where in Michigan
The Eastern Massasauga occurs throughout the Lower Peninsula and on Bois Blanc Island, Mackinac County … Michigan State University Extension
Conservation
state threatened; federally threatened
What the sources say

Venom: “Eastern massasauga rattlesnake (VENOMOUS).” (Michigan Department of Natural Resources)

Range: The Eastern Massasauga occurs throughout the Lower Peninsula and on Bois Blanc Island, Mackinac County. There are no records for this or any other venomous snake in the Upper Peninsula.

Habitat: The Eastern Massasauga, the only venomous species of snake in Michigan, inhabits marshes and swamps, though they often wander into upland meadows and woods in summer. (Michigan State University Extension)

Full Eastern Massasauga Rattlesnake guide

The other 17 snakes

From A to Z. Some harmless snakes mimic venomous ones: leave every snake alone.

Blue Racer
Photo: Dean Hester · CC BY 4.0 · iNaturalist

Blue Racer

Coluber constrictor foxii

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
This species occurs in the southern and western counties of Michigan's Lower Peninsula; though their numbers appear to be declining in the south, Blue Racers may be … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: This species occurs in the southern and western counties of Michigan's Lower Peninsula; though their numbers appear to be declining in the south, Blue Racers may be becoming more widespread in the northwestern Lower Peninsula. Records also exist for Menominee County in the Upper Peninsula.

Habitat: Blue Racers live in a variety of habitats, such as open woods, meadows, abandoned farmlands, raspberry thickets, and the edges of lakes and marshes. (Michigan State University Extension)

Brown Snake
Photo: Judy Gallagher · CC BY 2.0 · Wikimedia Commons

Brown Snake

Storeria dekayi

Non-venomous per Michigan Department of Natural Resources

Size
Most adults 9 to 13 inches; occasionally up to about 20 inches.
How to recognize it
  • Dark top of head; a dark spot under each eye and on each side of the neck
  • Keeled (ridged) scales in 17 rows; round pupil
  • Tennessee: a small dark downward streak on the side of the head
Where in Michigan
Brown Snakes are found throughout the Lower Peninsula of Michigan and in the southern tip of the Upper Peninsula bordering Wisconsin. Michigan State University Extension
69 records by month.
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: The Brown Snake is secretive and is usually found in moist locations hiding under flat objects. (Michigan State University Extension)

Full Brown Snake guide

Butler's Garter Snake
Photo: Stanton · CC BY-SA 4.0 · Wikimedia Commons · resized

Butler's Garter Snake

Thamnophis butleri

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Butler's Garter Snake occurs in scattered populations in the eastern and south central Lower Peninsula of Michigan. Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: This snake prefers moist meadows, marshes and the grassy edges of lakes and streams. (Michigan State University Extension)

Copper-bellied Water Snake
Photo: Peter Paplanus · CC BY 2.0 · Wikimedia Commons

Copper-bellied Water Snake

Nerodia erythrogaster neglecta

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Copper-bellied Water Snake is extremely rare in Michigan and is now found in only a few locations in the southern one-third of the Lower Peninsula … Michigan State University Extension
Conservation
state endangered
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: The Copper-bellied Water Snake is extremely rare in Michigan and is now found in only a few locations in the southern one-third of the Lower Peninsula. Most recent records are in Hillsdale and st. Joseph counties.

Habitat: Copper -bellied Water Snakes are usually found near streams, woodland ponds and river-bottom swamps. (Michigan State University Extension)

No confirmed photo of Eastern Fox Snake

Eastern Fox Snake

Pantherophis gloydi

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Eastern Fox Snake ranges from Saginaw Bay south along the coastal Great Lakes area to western Lake Erie. Michigan State University Extension
Conservation
state threatened
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: Flat, marshy or partially drained marsh country is the habitat of the Eastern Fox Snake. (Michigan State University Extension)

Eastern Garter Snake
Photo: Famartin · CC BY-SA 4.0 · Wikimedia Commons · resized

Eastern Garter Snake

Thamnophis sirtalis sirtalis

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Eastern Garter Snake is probably the most common Michigan snake and occurs throughout the state. Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: Woodlands, meadows, marshes, lake edges, debris piles and suburban backyards are all homes for this tolerant species. (Michigan State University Extension)

Eastern Hog-nosed Snake
Photo: Joshua Liverman · CC BY 4.0 · iNaturalist

Eastern Hog-nosed Snake

Heterodon platirhinos

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Although it occurs over much of Michigan's Lower Peninsula, in the Upper Peninsula the Eastern Hog-nosed Snake has been found only in Menominee County. Michigan State University Extension
40 records by month.
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: The Hog-nosed Sn*e is usually found in sandy areas, especially in the open, sandy woods of the northern and western Lower Peninsula. (Michigan State University Extension)

Eastern Milk Snake
Photo: Peter Paplanus · CC BY 2.0 · Wikimedia Commons

Eastern Milk Snake

Lampropeltis triangulum triangulum

Non-venomous per Michigan Department of Natural Resources

Size
Eastern milksnake 24 to 52 inches (Alabama); TN gives 24 to 36 inches for eastern and 21 to 28 for red milksnake.
How to recognize it
  • Eastern milksnake: black-and-white checkerboard belly (Ohio). Western milksnake in Louisiana: underside dull white with scattered black marks.
  • Eastern milksnake: a light Y- or V-shaped mark is usually present on the nape
  • Smooth, shiny scales and round pupils
Where in Michigan
This species occurs throughout Michigan's Lower Peninsula, and there are isolated records of its occurrence in Mackinac and Marquette counties in the Upper Peninsula. Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: These secretive snakes are found in woodlands, fields, marshes and farmlands. (Michigan State University Extension)

Full Eastern Milk Snake guide

Gray Rat Snake
Photo: Chrissy McClarren and Andy Reago · CC0 1.0 · iNaturalist

Gray Rat Snake

Elaphe obsoleta obsoleta

Non-venomous per Michigan Department of Natural Resources

Size
Adults 42 to 72 inches (3.5 to 6 feet), occasionally to 86 inches (MDC); Michigan adults frequently exceed 6 feet, record over 8 feet.
How to recognize it
  • Body shaped like a loaf of bread in cross section (flat belly meets the sides at an angle)
  • Weakly keeled scales, divided anal plate, squarish head
  • Freezes when approached; may kink its body like a crooked stick
Where in Michigan
In Michigan, the Black Rat Snake occurs in the southern half of the Lower Peninsula … Michigan State University Extension
Conservation
special concern (DNR; not on the state endangered/threatened rule)
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: In Michigan, the Black Rat Snake occurs in the southern half of the Lower Peninsula. This species is locally common in the southwestern counties, but it is rare and declining over most of its Michigan range. This is a species of "special concern" and may not be captured or killed.

Habitat: These snakes are most common in and near woodlands. They are quite arboreal and often forage and bask at considerable heights above the ground. (Michigan State University Extension)

Full Gray Rat Snake guide

Kirtland's Snake
Photo: Peter Paplanus from St. Louis, Missouri · CC BY 4.0 · Wikimedia Commons

Kirtland's Snake

Clonophis kirtlandii

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Kirtland 's Snake is an extremely rare species in Michigan. It has been found in a very few localities in the southern one-third of the Lower Peninsula … Michigan State University Extension
Conservation
state endangered
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: Kirtland 's Snake is an extremely rare species in Michigan. It has been found in a very few localities in the southern one-third of the Lower Peninsula. Most of the specimens found in Michigan have been reported from the two southernmost tiers of counties.

Habitat: This rarely seen snake occurs in a variety of moist habitats, which include wet meadows, tamarack swamps, open swamp-forest and vacant city lots. (Michigan State University Extension)

Northern Red-bellied Snake
Photo: Clay Gibbons · CC BY 4.0 · iNaturalist

Northern Red-bellied Snake

Storeria occipitomaculata occipitomaculata

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
This snake is found statewide except for the extreme southern edge of the Lower Peninsula … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: This snake is found statewide except for the extreme southern edge of the Lower Peninsula. Although it may be rare or absent in many areas within its range, this snake can be locally abundant in some places.

Habitat: The Northern Red-bellied Snake can be en- countered in a variety of habitats, including open woodland, meadows and abandoned farmland. (Michigan State University Extension)

Northern Ribbon Snake
Photo: Rstanton13 · CC BY-SA 4.0 · Wikimedia Commons · resized

Northern Ribbon Snake

Thamnophis sauritus septentrionalis

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Northern Ribbon Snake occurs throughout Michigan's Lower Peninsula. Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: This species inhabits the grassy edges of marshes, ponds, lakes and streams. (Michigan State University Extension)

Northern Ring-necked Snake
Photo: Sinéad Tuttle-Lerner · CC BY 4.0 · iNaturalist

Northern Ring-necked Snake

Diadophis punctatus edwardsi

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Although the Northern Ring-necked Snake has been found throughout Michigan, it is generally rare and occurs in widely scattered and isolated populations … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: Although the Northern Ring-necked Snake has been found throughout Michigan, it is generally rare and occurs in widely scattered and isolated populations. It can be common on some of the offshore islands in northern Lake Michigan.

Habitat: This species prefers moist woodlands. It is very secretive and is usually found hiding under flat objects or the bark of dead trees. (Michigan State University Extension)

Northern Water Snake
Photo: Adrienne van den Beemt · CC BY 4.0 · iNaturalist

Northern Water Snake

Nerodia sipedon sipedon

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Northern Water Snakes occur throughout Michigan but are scarce or absent from many parts of the Upper Peninsula, particularly the western section … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: Northern Water Snakes occur throughout Michigan but are scarce or absent from many parts of the Upper Peninsula, particularly the western section. Some islands, such as Beaver Island in norther~ Lake Michigan, support large populations.

Habitat: This species is usually found in or near ponds, lakes, streams or rivers. (Michigan State University Extension)

Queen Snake
Photo: Rstanton13 · CC BY-SA 4.0 · Wikimedia Commons · resized

Queen Snake

Regina septemvittata

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Queen Snake is uncommon to rare and occurs in scattered locations throughout the southern half of the Lower Peninsula, excluding portions of the Thumb area … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: The Queen Snake is uncommon to rare and occurs in scattered locations throughout the southern half of the Lower Peninsula, excluding portions of the Thumb area. An isolated population reportedly occurs on Bois Blanc Island in western Lake Huron.

Habitat: The Queen Snake is most often seen basking in the branches of shrubs that overhang shallow, rocky streams, but it also frequents the edges of ponds or canals. (Michigan State University Extension)

No confirmed photo of Smooth Green Snake

Smooth Green Snake

Liochlorophis vernalis

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
Historically, Smooth Green Snakes have been found and recorded throughout Michigan … Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Range: Historically, Smooth Green Snakes have been found and recorded throughout Michigan. They remain locally common in the northern Lower Peninsula and the Upper Peninsula but are rare and found only in widely scattered locations in the southern Lower Peninsula.

Habitat: These snakes are usually found in open, grassy places such as meadows, pastures and marsh edges. (Michigan State University Extension)

No confirmed photo of Western Fox Snake

Western Fox Snake

Elaphe vulpina

Non-venomous per Michigan Department of Natural Resources

Where in Michigan
The Western Fox Snake occurs in the central and western Upper Peninsula. Michigan State University Extension
What the sources say

Venom: “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.” (Michigan Department of Natural Resources)

Habitat: The Western Fox Snake prefers open woodlands and woodland edges, fields and dune areas. (Michigan State University Extension)

Snakes people confuse

Massasauga rattlesnake or Eastern vs. western (prairie) massasauga?

Massasauga rattlesnake
Photo: NPS photo · Public domain · Wikimedia Commons

Massasauga rattlesnake Venomous

Eastern vs. western (prairie) massasauga
Photo: User:Rstanton13 · CC BY-SA 4.0 · Wikimedia Commons · resized

Eastern vs. western (prairie) massasauga Venomous

The two massasaugas look almost the same; Missouri identifies them mainly by where they are found.

Photos show typical adults; individuals vary. Never get close to compare.

When snakes are active in Michigan

Records of snakes in Michigan peak in April to July. They show when people record snakes, not how many there are (about month bars).

985 records of snakes in Michigan by month (GBIF, CC0 and CC BY records).

If you are bitten or stung

Call 911 or Poison Help at 1-800-222-1222 right away. Poison Help connects you to your local poison center, any time of day.

Official advice from Michigan Department of Natural Resources:

How to report

Report poaching or harassment of massasaugas to the DNR Report All Poaching hotline, 800-292-7800. Report spotted lanternfly outside confirmed counties, gray fox and other sightings through the DNR/State 'Eyes in the Field' online tool. Report reptile/amphibian sightings to the Michigan Herp Atlas. Michigan Department of Natural Resources

Common questions

What official sources say

Are there venomous snakes in Michigan?

Yes. One: the Eastern Massasauga Rattlesnake is Michigan's only venomous snake. The other 17 snake species are harmless to humans. Michigan Department of Natural Resources

“Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.”

Are there venomous snakes in the upper peninsula?

No. DNR: massasaugas are not in the Upper Peninsula, so there are no venomous snakes on the mainland. DNR also places them on Bois Blanc and Mackinac islands in Lake Huron. Michigan Department of Natural Resources

“Massasaugas are found throughout the Lower Peninsula, but not in the Upper Peninsula (thus there are no venomous snakes on the Upper Peninsula mainland.)”

Are there water moccasins (cottonmouths) in Michigan?

No. The DNR says the massasauga is the only venomous species found in Michigan; MSU Extension says northern water snakes are often mistaken for 'water moccasins'. Michigan Department of Natural Resources

“…the eastern massasauga rattlesnake, the only venomous species found in Michigan”

About this list

The species list comes from Snakes: Species (Michigan DNR species page), with details from Michigan Snakes (MSU Extension Bulletin E-2000, revised 1999) (Michigan Department of Natural Resources, DNR page, Internet Archive capture 2026-03-12; guide revised 1999). 18 more entries come from other official sources named on each card.

Venom labels come only from official sources and link to them; "Not stated" never means harmless. How labels work.

Want a paper copy? Print the Michigan snakes ID chart.

Sources

  1. When encountering Michigan's snakes, best to leave them be. Michigan Department of Natural Resources. May 31, 2016; checked November 3, 2026.
    Quoted passages (2)
    “Michigan snakes do not attack, chase or lunge at people or seek out human contact. If a snake is observed, stay at least 3 feet away from the head to avoid getting bit. Handling or harassing snakes is the most common cause for humans getting bit.”
    “…the eastern massasauga rattlesnake, the only venomous species found in Michigan”
  2. Snakes (Michigan DNR species page). Michigan Department of Natural Resources. archived copy, captured March 12, 2026; checked November 3, 2026. Archived copy.
    Quoted passages (3)
    “Eighteen species of snakes are found in Michigan”
    “Seventeen of these species are nonvenomous, with the only venomous snake being the eastern massasauga rattlesnake.”
    “Eastern massasauga rattlesnake (VENOMOUS).”
  3. Michigan Snakes: A Field Guide and Pocket Reference (MSU Extension Bulletin E-2000). Michigan State University Extension (MSU Library archive). Revised 1999; checked November 3, 2026.
    Quoted passages (1)
    “Snakes usually come out of hibernation in April or early May in Michigan.and can sometimes be seen sunning themselves around the entrance to the underground cavity.”
  4. Eastern massasauga rattlesnake (Michigan DNR species page). Michigan Department of Natural Resources. archived copy, captured August 8, 2026; checked November 3, 2026. Archived copy.
    Quoted passages (2)
    “It is the only Michigan snake with segmented rattles on the end of its tail and elliptical, ("catlike") vertical pupils in the eyes.”
    “Massasaugas are found throughout the Lower Peninsula, but not in the Upper Peninsula (thus there are no venomous snakes on the Upper Peninsula mainland.)”
  5. DNR urges public to give eastern massasauga rattlesnake its space. Michigan Department of Natural Resources. August 6, 2026; checked November 3, 2026.
    Quoted passages (3)
    “The eastern massasauga rattlesnake is Michigan’s only venomous native snake. The snake’s bite is painful but extremely unlikely to be fatal.”
    “If you are bitten, stay calm and seek medical attention. If possible, call 911 for help, sit down and wait for emergency responders.”
    “…call the RAP (Report All Poaching) hotline immediately at 800-292-7800”
  6. GBIF.org occurrence records, human observations licensed CC0 1.0 or CC BY 4.0 only, accessed November 3, 2026. The datasets behind these counts are listed on our Sources page.