Snakes in Iowa: Corn State Slither Explorers

Ever wondered about the slithering wonders that might be hiding right in your backyard? Well, get ready to be amazed because Iowa is home to a staggering 27 species of snakes.

That’s right, from the tiny and adorable Brown Snake to the ever-impressive Timber Rattlesnake — Iowa boasts an array of mesmerizing serpents waiting to be discovered.

So grab your hiking boots, don’t forget your snake hook, and let’s dive right in to learn more about the diverse range of species that call the Hawkeye State home.

#	Name	Details	Image
1	Black Rat Snake (Pantherophis obsoletus)	Size: Up to 8 feet (2.4 meters) Color: Black with faint dark blotches Habitat: Forests, grasslands, and urban areas Behaviour: Diurnal and semi-arboreal
2	Bullsnake (Pituophis catenifer sayi)	Size: 4-6 feet (1.2-1.8 meters) Color: Brown or yellowish with dark blotches Habitat: Grasslands, deserts, woodlands, and agricultural areas Behaviour: Diurnal and terrestrial
3	Common Garter Snake (Thamnophis sirtalis)	Size: Up to 3-4 feet (0.9-1.2 meters) Color: Green or brown with three yellow stripes Habitat: Wet and moist habitats, including marshes, fields, and forests Behaviour: Diurnal, active, hibernates in winter
4	Copperbelly Water Snake (Nerodia erythrogaster neglecta)	Size: Up to 4.5 feet (1.37 meters) Color: Copper-red or orange on the belly, dark brown or black on the back Habitat: Wetland habitats, such as marshes, swamps, and ponds Behaviour: Nocturnal and semi-aquatic
5	Copperhead (Agkistrodon contortrix)	Size: Up to 3 feet (0.9 meters) Color: Coppery-brown with reddish-brown or dark hourglass-shaped bands Habitat: Forests, swamps, rocky terrain, and riverside habitats Behaviour: Solitary and primarily nocturnal
6	Dekay’s Brownsnake (Storeria dekayi)	Size: 9-15 inches (23-38 cm) Color: Brown or gray with dark spots Habitat: Forests, grasslands, wetlands, and urban areas Behaviour: Terrestrial, nocturnal, and secretive
7	Diamond-backed Water Snake (Nerodia rhombifer)	Size: 30-48 inches (76-122 cm) Color: Olive-green or brown with dark diamond patterns Habitat: Freshwater habitats, lakes, rivers, and swamps Behaviour: Diurnal, nocturnal, and good swimmer
8	Eastern Hog-nosed Snake (Heterodon platirhinos)	Size: 20-33 inches (51-84 cm) Color: Highly variable, typically brown or gray with dark blotches Habitat: Woodlands, grasslands, and sandy areas Behaviour: Diurnal, known for playing dead when threatened
9	Eastern Hog-nosed Snake (Heterodon platirhinos)	Size: 20-33 inches (51-84 cm) Color: Highly variable, typically brown or gray with dark blotches Habitat: Woodlands, grasslands, and sandy areas Behaviour: Diurnal, known for playing dead when threatened
10	Graham’s Crayfish Snake (Regina grahamii)	Size: 18-42 inches (46-107 cm) Color: Brown or olive-brown with dark spots Habitat: Wetlands, lakes, ponds, and slow-moving streams Behaviour: Aquatic, nocturnal, and secretive
11	Lined Snake (Tropidoclonion lineatum)	Size: Up to 20 inches (51 cm) Color: Gray or tan with dark stripes Habitat: Grasslands, prairies, and urban areas Behaviour: Nocturnal and fossorial
12	Milksnake (Lampropeltis triangulum)	Size: 20 to 60 inches (50 to 150 cm) Color: Red or orange with black and white bands Habitat: Various habitats, including forests, grasslands, and rocky hillsides Behaviour: Nocturnal and secretive
13	North American Racer (Coluber constrictor)	Size: Up to 6 feet (1.8 meters) Color: Blue, gray, or greenish with a white or yellow underside Habitat: Grasslands, meadows, forests, and farmlands Behaviour: Diurnal and terrestrial, fast-moving
14	Northern Water Snake (Nerodia sipedon)	Size: Up to 4.5 feet (1.4 meters) Color: Brown or gray with dark bands or blotches Habitat: Aquatic habitats, such as rivers, lakes, ponds, and marshes Behaviour: Nocturnal and semi-aquatic
15	Plains Garter Snake (Thamnophis radix)	Size: 16-28 inches (41-71 cm) Color: Brown or gray with yellow or orange stripes Habitat: Grasslands, wetlands, and areas near water sources Behaviour: Diurnal, good swimmers, and semi-aquatic
16	Prairie Kingsnake (Lampropeltis calligaster)	Size: 30-42 inches (76-107 cm) Color: Gray or light brown with dark blotches Habitat: Grasslands, farmlands, and woodlands Behaviour: Nocturnal and terrestrial
17	Prairie Rattlesnake (Crotalus viridis)	Size: 20-50 inches (51-127 cm) Color: Greenish or brownish with dark bands and a rattle on the tail Habitat: Prairies, grasslands, and scrublands Behaviour: Nocturnal, terrestrial, and ambush predators
18	Prairie Ringneck Snake (Diadophis punctatus arnyi)	Size: 10-15 inches (25-38 cm) Color: Gray or olive with a yellow or orange ring around the neck Habitat: Prairies, grasslands, and woodlands Behaviour: Nocturnal, secretive, and burrow-dwelling
19	Red-Bellied Snake (Storeria occipitomaculata)	Size: 8-16 inches (20-41 cm) Color: Gray or brown with a red or orange belly Habitat: Forests, woodlands, and wetlands Behaviour: Nocturnal, secretive, and terrestrial
20	Smooth Earth Snake (Virginia valeriae)	Size: 7-10 inches (18-25 cm) Color: Brown or gray with a lighter belly Habitat: Forests, woodlands, and grasslands Behaviour: Nocturnal, secretive, and burrow-dwelling
21	Smooth Green Snake (Opheodrys vernalis)	Size: 14-20 inches (36-51 cm) Color: Bright green with a lighter belly Habitat: Grasslands, meadows, and open woodlands Behaviour: Diurnal, terrestrial, and good climbers
22	Speckled Kingsnake (Lampropeltis holbrooki)	Size: Up to 4 feet (1.2 meters) Color: Tan or light brown with dark brown or black speckles Habitat: Forests, grasslands, and scrublands Behaviour: Diurnal and terrestrial
23	Timber Rattlesnake (Crotalus horridus)	Size: Up to 6 feet (1.8 meters) Color: Yellow, brown, gray, or black with dark bands Habitat: Forests, mixed woodlands, and rocky hillsides Behaviour: Solitary and ambush predator
24	Western Foxsnake (Pantherophis ramspotti)	Size: 3 to 5 feet (0.9 to 1.5 meters) Color: Light brown to golden brown with dark brown to black blotches Habitat: Grasslands, woodlands, and farmlands Behaviour: Mainly nocturnal and good climbers
25	Western Massasauga (Sistrurus tergeminus)	Size: 20 to 30 inches (51 to 76 cm) Color: Gray or light brown with dark brown blotches Habitat: Grasslands, prairies, and marshy areas Behaviour: Nocturnal and terrestrial
26	Western Ribbonsnake (Thamnophis proximus)	Size: 18-30 inches (46-76 cm) Color: Black or dark brown with three bright yellow or white stripes Habitat: Semi-aquatic habitats, wetlands, marshes, and grasslands near water Behaviour: Diurnal, swift, and good swimmer
27	Western Wormsnake (Carphophis vermis)	Size: Up to 14 inches (35.5 cm) Color: Brown to black on the back and pink or light brown on the belly Habitat: Deciduous forests, grasslands, and suburban areas with moist soil Behaviour: Secretive, nocturnal, and burrowing

27 Snakes You Can Find in Iowa

In the state of Iowa, a fascinating array of serpents can be found slithering through its diverse landscapes. From venomous to harmless, each species has its unique story to tell. Below, we’ll explore the wonders of these often misunderstood creatures of Iowa, from their natural habitats and behaviors to the challenges they face in our changing world.

1. Black Rat Snake

Pantherophis obsoletus, commonly known as Black Rat Snake, can grow up to 8 feet (2.4 meters) long, with a black and dark-blotched coloring. These non-venomous reptiles inhabit forests, grasslands, and urban areas of Iowa, showcasing diurnal and semi-arboreal behavior. Their diet consists of rodents, birds, and eggs. Female Black Rat Snakes lay eggs in clutches of 5-30 during the reproduction season. Although not endangered, these snakes play an important role in controlling rodent populations.

2. Bullsnake

The Bullsnake (Pituophis catenifer sayi), a non-venomous constrictor, measures 4-6 feet (1.2-1.8 meters) and exhibits a brown or yellowish color with dark blotches. Found in grasslands, deserts, woodlands, and agricultural areas, these diurnal and terrestrial snakes primarily feed on rodents, rabbits, ground-nesting birds, and eggs. During the reproduction, the female Bullsnake lays egg clutches ranging from 5-22. With a conservation status listed as “Least Concern”, the Bullsnake is not currently under threat in Iowa.

3. Common Garter Snake

The Common Garter Snake (Thamnophis sirtalis) is a 3-4 feet (0.9-1.2 meters) non-aggressive and mildly venomous reptile with a green or brown body and three yellow stripes. Inhabiting wet and moist habitats like marshes, fields, and forests of Iowa, these diurnal snakes hibernate during winter to escape the cold. Their diet consists of frogs, fish, earthworms, and small mammals. Uniquely, these snakes birth live young, producing 10-40 per litter. Although venomous, they pose no threat to humans and are currently listed as a species of least concern for conservation.

4. Copperbelly Water Snake

Copperbelly Water Snake (Nerodia erythrogaster neglecta) is a non-venomous reptile that grows up to 4.5 feet (1.37 meters) long. Sporting a distinctive copper-red or orange belly and dark brown or black back, this semi-aquatic, nocturnal snake inhabits wetland areas, such as marshes, swamps, and ponds. It primarily feeds on fish and amphibians. Copperbelly Water Snakes reproduce by laying eggs in clutches of 10-30. Currently, their conservation status is considered threatened.

5. Copperhead

The Copperhead (Agkistrodon contortrix) is a venomous snake up to 3 feet (0.9 meters) long, known for its coppery-brown coloring with reddish-brown or dark hourglass-shaped bands. Inhabiting forests, swamps, rocky terrain, and riverside habitats, these solitary and primarily nocturnal creatures prey on rodents, birds, frogs, and insects. Copperheads give live birth to 2-18 young in late summer or early fall. Though venomous, their venom is relatively mild compared to other venomous snakes. Their conservation status is of least concern.

6. Dekay’s Brownsnake

Storeria dekayi, commonly known as Dekay’s Brown Snake, is a small, non-venomous reptile, measuring 9-15 inches (23-38 cm) in length. Its brown or gray body features dark spots, and it inhabits forests, grasslands, wetlands, and urban areas. Exhibiting terrestrial, nocturnal, and secretive behavior, its diet consists primarily of earthworms, slugs, and other soft-bodied invertebrates. A fascinating ovoviviparous species, Dekayís Brown Snake gives birth to live young, bearing 3-40 offspring. Its current conservation status is classified as least concern.

7. Diamond-backed Water Snake

The Diamond-backed Water Snake (Nerodia rhombifer) is a non-venomous reptile measuring 30-48 inches (76-122 cm) in length. Its olive-green or brown skin features dark diamond patterns, providing excellent camouflage in its freshwater habitat which includes lakes, rivers, and swamps. As a diurnal and nocturnal creature, this adept swimmer mainly feeds on fish, amphibians, and small reptiles. The species reproduces through live birth, with each litter consisting of 13-60 young. Currently, it holds a conservation status of Least Concern.

8. Eastern Hog-nosed Snake

The Eastern Hog-nosed Snake (Heterodon platirhinos) is a moderately-sized serpent, reaching lengths of 20-33 inches (51-84 cm). Its coloration is highly variable, typically exhibiting brown or gray hues with dark blotches. Inhabiting woodlands, grasslands, and sandy areas, this diurnal snake is known for playing dead when threatened. Its diet mainly consists of toads, along with other amphibians and small mammals. It reproduces by laying 4-60 eggs per clutch, has mild venom harmless to humans, and is classified as of “Least Concern” in conservation efforts.

9. Eastern Hog-nosed Snake

The Eastern Hog-nosed Snake (Heterodon platirhinos) is a moderately-sized serpent, reaching lengths of 20-33 inches (51-84 cm). Its coloration is highly variable, typically exhibiting brown or gray hues with dark blotches. Inhabiting woodlands, grasslands, and sandy areas, this diurnal snake is known for playing dead when threatened. Its diet mainly consists of toads, along with other amphibians and small mammals. It reproduces by laying 4-60 eggs per clutch, has mild venom harmless to humans, and is classified as of “Least Concern” in conservation efforts.

10. Graham’s Crayfish Snake

Regina grahamii, commonly known as Graham’s Crayfish Snake, is a non-venomous aquatic species that measures between 18-42 inches in length. Its brown or olive-brown coloration is marked with dark spots. This nocturnal and secretive snake inhabits wetlands, lakes, ponds, and slow-moving streams. Its primary diet consists of crayfish, supplemented by small fish and amphibians. The snake lays eggs in clutches of 5-25, and its conservation status is currently classified as “least concern.”

11. Lined Snake

The Lined Snake (Tropidoclonion lineatum) is a small, non-venomous species, growing up to 20 inches (51 cm). It has a gray or tan colored body with dark stripes, adapted to living in grasslands, prairies, and urban areas. Being nocturnal and fossorial, this reptile primarily feeds on earthworms, slugs, and soft-bodied insects. Lined Snakes reproduce by laying eggs in clutches of 2-12. With a conservation status of least concern, they remain a thriving species.

12. Milksnake

The Milksnake (Lampropeltis triangulum) is a non-venomous and nocturnal reptile, ranging in size from 20 to 60 inches (50 to 150 cm) in length. It exhibits vibrant colors like red or orange, with black and white bands. Milksnakes inhabit various environments, such as forests, grasslands, and rocky hillsides. Their secretive nature makes them difficult to spot. The species primarily feeds on rodents, birds, eggs, and other reptiles. Reproduction involves laying egg clutches of 2-17. Currently, their conservation status is of least concern.

13. North American Racer

The North American Racer (Coluber constrictor) is a non-venomous snake species that can reach up to 6 feet (1.8 meters) in length. Characterized by blue, gray, or greenish scales and a white or yellow underside, these diurnal and terrestrial creatures inhabit grasslands, meadows, forests, and farmlands. Known for their fast-moving behavior, they primarily feed on small mammals, birds, frogs, and insects. North American Racers reproduce by laying eggs in clutches of 4-30, and their conservation status is listed as least concern.

14. Northern Water Snake

The Northern Water Snake (Nerodia sipedon) is a non-venomous reptile that can grow up to 4.5 feet (1.4 meters) in length. It is characterized by its brown or gray color with dark bands or blotches. This nocturnal and semi-aquatic species can be found in a variety of aquatic habitats, including rivers, lakes, ponds, and marshes. Its diet consists of fish, amphibians, and invertebrates. Northern Water Snakes reproduce by laying eggs in clutches of 10-30, and currently have a conservation status of least concern.

15. Plains Garter Snake

The Plains Garter Snake (Thamnophis radix) is a non-venomous reptile characterized by its brown or gray color with yellow or orange stripes. Typically measuring 16-28 inches (41-71 cm) in length, it thrives in grasslands, wetlands, and areas near water sources. These diurnal, semi-aquatic snakes are known for their swimming prowess. They feed primarily on earthworms, amphibians, fish, and invertebrates. Mating results in live births, producing 6-80 offspring per litter. Currently, their conservation status is of least concern.

16. Prairie Kingsnake

The Prairie Kingsnake (Lampropeltis calligaster) is a non-venomous reptile that measures 30-42 inches (76-107cm) in length. It has a gray or light brown color, adorned with dark blotches. Commonly found in grasslands, farmlands, and woodlands, Prairie Kingsnakes are terrestrial and nocturnal by nature. Their diet includes rodents, birds, lizards, and amphibians. During reproduction, they lay clutches containing 5-17 eggs. Currently, the Prairie Kingsnake’s conservation status is listed as least concern.

17. Prairie Rattlesnake

The Prairie Rattlesnake (Crotalus viridis) is a venomous snake inhabiting prairies, grasslands, and scrublands. Typically measuring 20-50 inches (51-127 cm) in length, it features a greenish or brownish coloration with dark bands and a distinctive rattle on its tail. As nocturnal, terrestrial, and ambush predators, they mainly feed on small mammals, birds, and reptiles. These live-bearing snakes, with 4-21 offspring per litter, pose a potential danger to humans though their venom is usually not fatal. Currently, they hold a conservation status of Least Concern.

18. Prairie Ringneck Snake

The Prairie Ringneck Snake (Diadophis punctatus arnyi) is a small reptile measuring 10-15 inches (25-38 cm) in length, characterized by its gray or olive coloring and distinctive yellow or orange ring around its neck. These snakes are native to prairies, grasslands, and woodlands, leading a predominantly nocturnal, secretive, and burrow-dwelling lifestyle. Their diet consists of earthworms, slugs, small salamanders, and insects. They lay eggs in clutches of 3-10 and possess weak venom which poses no threat to humans. Currently, their conservation status is listed as “least concern.”

19. Red-Bellied Snake

The Red-Bellied Snake (Storeria occipitomaculata) is a small, non-venomous snake measuring 8-16 inches (20-41 cm) in length. They are gray or brown with a distinctive red or orange belly. Mostly found in forests, woodlands, and wetlands of Iowa, these nocturnal and secretive creatures primarily feed on slugs, snails, and earthworms. As live-bearing reptiles, they produce 4-21 offspring in each litter. With a conservation status of “Least Concern,” this terrestrial snake presents no significant threat to humans.

20. Smooth Earth Snake

The Smooth Earth Snake (Virginia valeriae) is a small, non-venomous reptile measuring 7-10 inches (18-25 cm) in length. It has a brown or gray coloration, with a lighter belly, and inhabits forests, woodlands, and grasslands. This secretive, nocturnal snake is known for burrow-dwelling and primarily feasts on earthworms, slugs, and insects. The species is live-bearing, producing 3-10 offspring per litter. With a conservation status of “Least Concern,” the Smooth Earth Snake population remains relatively stable.

21. Smooth Green Snake

The Smooth Green Snake (Opheodrys vernalis) measures 14-20 inches (36-51 cm) and is characterized by its vibrant green color and lighter belly. Commonly found in grasslands, meadows, and open woodlands, this diurnal and terrestrial reptile is an adept climber. Its diet mainly consists of insects and spiders. In terms of reproduction, they lay eggs in clutches of 3-12. Though non-venomous, these snakes should be admired from afar. Fortunately, their conservation status is currently listed as ‘Least Concern.’

22. Speckled Kingsnake

The Speckled Kingsnake (Lampropeltis holbrooki) is a non-venomous reptile that grows up to 4 feet in length. Sporting a tan or light brown color with dark brown or black speckles, this snake dwells in forests, grasslands, and scrublands. As a diurnal and terrestrial creature, it preys on small mammals, birds, and reptiles during the day. Speckled Kingsnakes reproduce by laying eggs in clutches of 4-12, and are currently categorized as least concern in terms of conservation status.

23. Timber Rattlesnake

The Timber Rattlesnake, scientifically known as Crotalus horridus, is a solitary, ambush predator that can grow up to 6 feet (1.8 meters) in length. It comes in various colors, including yellow, brown, gray, or black with dark bands, and inhabits forests, mixed woodlands, and rocky hillsides. Its diet consists of rodents, birds, and small mammals. Unlike most snakes, the Timber Rattlesnake is viviparous, giving birth to 4-14 live young. It possesses hemotoxic venom, and its conservation status is currently listed as least concern.

24. Western Foxsnake

The Western Foxsnake (Pantherophis ramspotti) is a non-venomous snake species typically measuring 3 to 5 feet in length. Its coloration ranges from light brown to golden brown and is adorned with dark brown to black blotches. Commonly found in grasslands, woodlands, and farmlands, these snakes are mainly nocturnal and exhibit excellent climbing abilities. Their diet consists of rodents, birds, and bird eggs. Western Foxsnakes reproduce by laying eggs in clutches of 10 to 20, and their conservation status is listed as Least Concern.

25. Western Massasauga

The Western Massasauga (Sistrurus tergeminus) is a small rattlesnake, measuring between 20 to 30 inches (51 to 76 cm) in length. Their coloration is gray or light brown, adorned with dark brown blotches. Native to grasslands, prairies, and marshy areas, these nocturnal and terrestrial creatures mainly feed on small mammals, birds, and reptiles. They give birth to live young, with 5-12 offspring per litter. Although venomous, their bites are not typically fatal to humans. Currently, their conservation status is listed as least concern.

26. Western Ribbonsnake

The Western Ribbonsnake (Thamnophis proximus) is a slender reptile measuring 18-30 inches (46-76 cm) in length, characterized by its black or dark brown coloration adorned with three bright yellow or white stripes. Commonly found in semi-aquatic habitats such as wetlands, marshes, and grasslands near water, this diurnal creature is a swift swimmer, preying primarily on fish, frogs, and tadpoles. The non-venomous species reproduces by laying egg clutches of 3-26, and has a conservation status of ‘Least Concern’.

27. Western Wormsnake

The Western Wormsnake (Carphophis vermis) is a non-venomous, small-sized reptile reaching up to 14 inches (35.5 cm) in length. It exhibits a distinct color pattern of brown-to-black on its back and pink or light brown on its belly. Inhabiting deciduous forests, grasslands, and moist suburban areas, this elusive, nocturnal creature primarily burrows underground and feeds on earthworms and soft-bodied invertebrates. Western Wormsnakes lay small egg clutches (1-8) and have a conservation status of Least Concern.

Nearby States:

• Snakes in Kansas
• Snakes in Michigan

Final Words

All the 27 snakes have truly opened our eyes to the fascinating world of snakes found in Iowa. Who knew there were so many different types of these slithering reptiles, each with their own unique characteristics and habitats?

Not only did we get a chance to learn about some of the more common and well-known species, but we also delved into the lesser-known and often misunderstood ones.

So, the next time you’re out and about in Iowa, keep an eye out for these incredible creatures, and let’s continue to appreciate and protect the diverse wildlife that makes our world so interesting!

What Types of Snakes Can Be Found in the Corn State of Iowa?

Iowa is known for its diverse snake population, including the eastern garter snake, fox snake, and smooth green snake. These snakes in illinois: prairie state hissy tales can be found in various habitats across the state, from grasslands to forests. It’s important to be cautious when encountering these snakes in the wild.

What Types of Snakes Can Be Found in Iowa?

In Iowa, you can find various types of snakes in the wild, including the garter snake, the fox snake, and the bullsnake. However, the venomous snakes in mississippi discovery have not been reported in Iowa, so most of the snakes you encounter in the state are harmless and play an important role in the ecosystem.

Resources:

• Volume 46, Issue 8, 1968 August 1968
• Aq Ed EE book list PreK-12
• Get Movin – Iowa Department of Human Services
• Nature Revealed Teacher Guide