The 33 Types of SNAKES That Live in Oklahoma! (ID Guide)
There are A LOT of snakes in Oklahoma!
And what’s interesting is that they are all incredibly unique and have adapted to fill many habitats and niches.
You’ll see that the snakes that live in Oklahoma are very different from each other.
For example, some species are venomous, while others use constriction to immobilize their prey. Or the fact that certain snakes are rarely seen because they spend most of their time underground, but others are comfortable living EXTREMELY close to humans.
Today, you’re going to learn about the 33 types of snakes in Oklahoma!
Also, if you enjoy this article, make sure to check out these other Oklahoma guides!
11 FROGS Found in Oklahoma! (ID Guide)
16 Types of TURTLES in Oklahoma! (Both aquatic and land)
#1. Eastern Copperhead
- Agkistrodon contortrix
- Adults reach lengths between 20 and 37 inches.
- Stout body, broad head, and elliptical pupils.
- Coloration varies from pale tan to pinkish-tan with darker, splotchy, hourglass-shaped bands, which are darker at the edges.
Look for these VENOMOUS snakes in eastern Oklahoma in deciduous forests and mixed woodlands, often near rocky outcroppings. You’re more likely to see them active during the day in the spring and fall when the weather is cooler. During the middle of summer, Eastern Copperheads are often nocturnal.
Eastern Copperhead Range Map
Credit: Virginia Herpetological Society
This species is an ambush hunter, meaning that it selects a suitable site and waits to surprise its prey. In addition, copperheads are considered “pit vipers,” which means they have a heat-sensing organ located between their eyes. This adaptation helps these venomous snakes find and judge the size of their prey by being able to sense infrared!
Bites from these snakes are rarely fatal in Oklahoma.
The venom they produce has relatively low potency. In addition, copperheads also frequently employ false strikes, dry bites, and warning bites. Dry bites contain no venom, and warning bites have a relatively small amount of venom.
These snakes primarily feed on small rodents, frogs, birds, and large insects such as cicadas. After the initial bite, they will wait for the venom to take effect before consuming their prey whole.
#2. Broad-banded Copperhead
- Agkistrodon laticinctus
- Adults range from 20 to 36 inches in length.
- Tan coloration with wide, dark bands.
- Broad head is distinct from the neck, heat-sensing pits between the eyes and nostrils, and elliptical pupils.
The Broad-banded Copperhead is found in woodland habitats that include oak, cedar, and juniper trees. They prefer areas with heavy leaf litter or pine needles and can sometimes be spotted near rotten logs, piles of woody debris, ledges, and rocky bluffs. Their range overlaps with the Eastern Copperhead in Oklahoma.
Broad-banded Copperhead Range Map
Credit: Virginia Herpetological Society
When threatened, these venomous snakes normally lie motionless, relying on camouflage for defense. This adaptation sometimes leads to unaware humans and pets stepping on them. They may also vibrate their tail in the leaf litter and lift it up as a warning. If they continue to be disturbed, they may deliver false strikes or bite.
Broad-banded Copperheads have a hemotoxic venom that destroys blood cells and tissue. Luckily, bites to humans are uncommon in Oklahoma, and the venom is not ordinarily deadly to healthy adults but can cause localized swelling, necrosis, and severe pain. If bitten, medical attention should be sought.
#3. Western Diamond-backed Rattlesnake
- Crotalus atrox
- Adults typically grow to about 4 feet in length.
- Coloration ranges from brown, gray, brick red, pinkish, and chalky white. Look for the darker diamond-shaped blotches down its back, outlined by white scales.
- Broad, spade-shaped head with a black mask over the eyes. Elliptical pupils and pits between eyes and nostrils.
- A rattle on the tail alternates between black and white-colored bands.
This famous VENOMOUS snake has a wide range of habitats in Oklahoma!
You might spot them in grassy plains, forested areas, rocky hillsides, and river bottoms. But your best chance to see one might be on a rural road in the evening because of the heat the pavement retains.
Western Diamond-backed Rattlesnake Range Map
The Western Diamond-backed feeds on small mammals such as squirrels, chipmunks, gophers, prairie dogs, rabbits, mice, and rats. They also consume birds that fly within reach. Like other pit vipers, they ambush their prey and track them while the venom takes effect.
When threatened, these snakes typically stand their ground. They rattle and coil, lifting themselves off the ground to prepare to strike.
If you hear their characteristic rattle, make sure to leave the area slowly! Due to their specialized fangs and large venom glands, these snakes can deliver a lot of venom in a single bite! Untreated bites have a 10 – 20% mortality rate, so make sure to get to the hospital quickly if struck!
#4. Timber Rattlesnake
- Crotalus horridus
- Adults typically range from 30 to 60 inches in length.
- Coloration is variable and generally ranges from yellowish-brown to gray to almost black. Look for dark brown or black crossbands on their back.
- Heavy-bodied with characteristic rattle on the tail.
The Timber Rattlesnake, also known as the Canebrake Rattlesnake, is found in a wide variety of habitats in eastern Oklahoma. Look for these venomous snakes in lowland thickets, high areas around rivers and flood plains, agricultural areas, deciduous forests, and coniferous forests.
Timber Rattlesnake Range Map
Credit: Virginia Herpetological Society
These snakes are ambush predators, waiting for unsuspecting prey to come within range of their strike. They feed primarily on small mammals but may also consume frogs, birds, and other smaller snakes. Timber Rattlesnakes strike their prey and release them, waiting until their venom has taken effect before eating them.
These venomous snakes are potentially the most dangerous species found in Oklahoma due to their large size, long fangs, and high venom yield. Luckily, Timber Rattlesnakes have a mild disposition and don’t bite often. They typically give plenty of warning by rattling and posturing.
The Timber Rattlesnake played a noteworthy role in U.S. history. Found in the original 13 colonies, it was used as a symbol during the American Revolution. In 1775 it was featured at the center of the “Gadsden Flag.” This yellow flag depicts a coiled and ready-to-strike Timber Rattlesnake and the words “Don’t Tread on Me.”
#5. Prairie Rattlesnake
- Crotalus viridis
- Adults typically range between 3.3 and 5 feet in length.
- Coloration is highly variable and can be greenish-gray, olive green, greenish-brown, light brown, or yellow. All variations have dark blotches on the body that turn into rings near the tail.
- Broad triangular head, elliptical pupils, heat-sensing pits between the eyes and nostrils, and a tail rattle.
These venomous snakes can be found in western Oklahoma in open prairies, grasslands, semi-desert shrublands, and forested environments.
The Prairie Rattlesnake hibernates during the winter, often in communal dens. These dens are typically rock crevices, caves, or old mammal burrows. Individual snakes return to the same den each winter and migrate up to seven miles to their hunting grounds in the spring.
When they feel threatened, these snakes freeze to use their camouflage to avoid detection. They may also quietly crawl away to cover. If approached, they may coil and rattle their tail as a warning before striking. Their potent venom has both hemotoxic and neurotoxic properties, and although rare, can be fatal to an adult human.
Prairie Rattlesnakes are listed on the ICUN Red List as a species of least concern. However, they are considered threatened and declining in parts of their range. In addition, they have faced pressure from habitat fragmentation and hunting.
#6. Western Massasauga
- Sistrurus tergeminus
- Adults range from 14 to 36 inches in length.
- Coloration is gray to light brown with dark brown blotches on the back.
- Thick body, large triangular head, heat-sensing pits between the eyes and nostrils, elliptical pupils.
- Being rattlesnakes, look for the rattle at the end of their tail.
The Western Massasauga is a rattlesnake and one of the smallest venomous snakes in the country! They primarily inhabit grassland habitats but can also be found in open sagebrush prairie, rocky hillsides, prairie hillsides, open wetlands, and grassy wetlands.
Western Massasauga Range Map
These snakes are secretive and not often seen in Oklahoma.
When detected, they often freeze rather than rattle. However, when they do rattle, Western Massasaugas make a distinctive sound. Their rattle is significantly higher pitched than larger rattlesnakes and has earned this small snake the nickname “buzz tail.”
Though their venom is highly potent, the small quantity they deliver makes their bites much less likely to be fatal in humans compared to larger venomous snakes. However, you still need to respect them as their venom is hemotoxic and will cause localized swelling, extreme pain, and necrosis. Medical attention should be sought immediately if bitten!
#7. Common Water Snake
- Nerodia sipedon
There are two subspecies of the Common Water Snake in Oklahoma.
Their coloration varies depending on which one you see!
Northern Water Snake (N. s. sipedon):
- Coloration is pale grey to dark brown with reddish-brown to black bands.
- Large adults become darker with age and appear almost plain black or dark brown.
Midland Water Snake (N. s. pleuralis):
- Typically light gray in color, but some individuals are reddish.
- Near the head, they have dark crossbands. As you move down the snake, the crossbands are replaced by dark squarish blotches.
Common Water Snakes prefer slow-moving or standing water such as ponds, lakes, vernal pools, marshes, and slow-moving rivers and streams. They’re most often seen basking on rocks or logs in or near the water.
Common Water Snake Range Map
Credit: Virginia Herpetological Society
When disturbed, Common Watersnakes flee into the water to escape. However, if grabbed or captured, they’re quick to defend themselves. They will release a foul-smelling musk from glands near the base of their tale, flatten their body, and strike the attacker. Their saliva contains a mild anticoagulant that can cause bites to bleed, making the injury appear worse.
While non-venomous, they can deliver a painful bite!
Common Water Snake populations are considered to be stable in Oklahoma. However, like many other water snakes, this species faces habitat loss and degradation. Unfortunately, they are also commonly killed by people out of fear.
#8. Plain-bellied Watersnake
- Nerodia erythrogaster
- Adults have thick bodies and range from 24 to 40 inches in length.
- Solid coloration of gray, brown, olive, or black.
- As the name suggests, they have a plain unmarked underside varying from red to yellow.
- Also called Redbelly, Yellowbelly, Copperbelly, or Blotched Watersnake.
The Plain-bellied Watersnake can be found near various water sources, including rivers, floodplains, lakes, ponds, and wetlands. This species spends an unusual amount of time on land compared with other water snakes found in Oklahoma. Especially during hot, humid weather, they can be found in woodlands quite far from a water source.
Plain-bellied Watersnake Range Map
Credit: Virginia Herpetological Society
They feed on BOTH aquatic and terrestrial prey, including crayfish, fish, salamanders, frogs, and other amphibians. Another unusual feature of this species is that they will sit and wait to ambush their prey, especially on land. Almost all other water snakes actively hunt and chase their victims!
If captured, they release a foul-smelling musk and are not afraid to bite! Plain-bellied Watersnakes are eaten by largemouth bass, egrets, hawks, and sometimes other larger snakes.
#9. Northern Cottonmouth
- Agkistrodon piscivorus
- Adults range from 26 to 35 inches in length. Females are typically smaller than males.
- Most individuals are dark gray to black with a broad head, heat-sensing pits between the eyes and nostrils, elliptical pupils, and a blunt snout.
- Some individuals have a brown, gray, tan, or blackish coloration.
- Also commonly called Water Moccasins, Black Moccasins, or Gapers.
Cottonmouths are the ONLY venomous water snake in Oklahoma.
Be on the lookout for these snakes near swamps, marshes, ponds, and slow-moving streams and rivers, as well as flooded fields and drainage ditches. But they aren’t limited to just aquatic habitats. Cottonmouths can also be found in pine forests, dune areas, and prairies.
Northern Cottonmouth Range Map
Credit: Virginia Herpetological Society
These water snakes have several defensive tactics to warn potential threats to stay away! They often vibrate their tail in the leaf litter, pull their heads up and back, and then open their mouth to hiss and expose a white interior. This particular display is what earned them the name “cottonmouth.“
Since they are venomous, please use extra caution if you come across an unknown water snake. Quite a few species look similar, especially if you just get a glance as one moves across the water.
Luckily, receiving a bite from a Northern Cottonmouth is rare. But when it does happen, it’s very serious as their venom destroys tissue. It is rare to die from their bite, but it does cause swelling and bruising and can leave scars.
#10. Southern Watersnake
- Nerodia fasciata
- Adults range from 24 to 48 inches in length.
- Coloration is typically gray, greenish-gray, or brown with darker cross bands. However, some individuals may be so dark that the bands are barely distinguishable.
- Flat heads and heavy bodies.
- Also commonly called the Broad-banded Watersnake.
The Southern Watersnake is found in southeast Oklahoma near most freshwater sources within their range. Look for them everywhere, including lakes, ponds, rivers, marshes, swamps, wetlands, and streams. They’re often spotted on branches overhanging the water, sunning themselves.
Southern Watersnake Range Map
Credit: U.S. Geological Survey, Department of the Interior/USGS
These snakes are primarily nocturnal and spend much of their time hunting along the shoreline for frogs and small fish. Like other watersnakes, they quickly grab their prey and swallow it alive.
Southern Watersnakes are docile and non-venomous. But when they are captured or grabbed, they will flatten their heads, release a foul-smelling musk from glands near the tip of their tail, and may bite. Unfortunately, they are sometimes killed because they are mistaken for the venomous cottonmouth.
#11. Diamond-backed Watersnake
- Nerodia rhombifer
- Adults range from 30 to 48 inches in length.
- Coloration is brown, dark brown, yellowish, or olive green. Look for a dark chain-like pattern down the back.
- Thick body with a yellow belly that has dark half-moons.
The Diamond-backed Watersnake can be found in Oklahoma in a variety of freshwater habitats. They generally prefer slow-moving bodies of water with overhanging vegetation such as ponds, swamps, slow rivers, and streams.
These snakes are common in their range and can be spotted on overhanging branches looking for prey, which mainly include frogs and fish. Once they grab their target, they haul it to shore and wait for it to die before consuming it. This behavior is unique as most other water snakes consume their prey alive.
Diamond-backed Watersnake Range Map
Credit: U.S. Geological Survey, Department of the Interior/USGS
When disturbed, Diamond-backed Watersnakes will quickly flee into the water and dive below the surface to swim away. If captured, they will bite and release a foul-smelling musk from glands near the base of their tail.
They are relatively common and aren’t considered a threatened species. Unfortunately, they are sometimes killed out of ignorance. People often mistake them for venomous cottonmouths and rattlesnakes.
#12. Graham’s Crayfish Snake
- Regina grahamii
- Adults range from 18 to 28 inches in length.
- Coloration is a dull brown, yellowish-brown, or gray.
- Look for yellowish-tan stripes down the sides and sometimes a faint tan stripe down the middle of the back.
This water snake is rather reclusive and hard to find in Oklahoma.
Look for Graham’s Crayfish Snakes in slow-moving bodies of water such as ponds, prairie streams, marshes, and roadside ditches. They prefer areas with abundant vegetation, rocks, logs, and other debris along the water’s edge, which allows them to hide from predators. They are commonly seen basking on branches overhanging the water.
Graham’s Crayfish Snake Range Map
Credit: U.S. Geological Survey, Department of the Interior/USGS
As the name suggests, Graham’s Crayfish Snakes primarily feed on crayfish. They hunt exclusively for individuals that recently molted and temporarily have soft bodies. However, they’ll also prey on fish and amphibians, including tadpoles and frogs.
Like many other water snakes, this species is often mistaken for cottonmouths and killed, even though they are MUCH smaller.
#13. Glossy Swampsnake
- Liodytes rigida
- Adults range from 14 to 24 inches in length.
- Coloration is a glossy brownish to olive with yellow lip scales. Sometimes two dark or black stripes run down the back.
- The underside is yellow with two rows of black half-moons or dots.
- Also commonly called the Gulf Swampsnake.
Glossy Swampsnakes inhabit and rarely leave slow-moving waterways such as cypress swamps, roadside ditches, ponds, lakes, marshes, streams, and rivers. These water snakes are quite secretive and often hide under logs and debris near the water or inside crayfish burrows. Your best chance to see one might be on roadways during or after heavy rain.
Glossy Swampsnake Range Map
Credit: U.S. Geological Survey, Department of the Interior/USGS
These nocturnal snakes primarily feed on crayfish. They don’t constrict their prey but use their coils to help hold it while swallowing it alive, typically tail-first. Their small, chisel-shaped teeth allow them to consume hard-shelled crayfish.
When disturbed, Glossy Swampsnakes quickly flee into the water and dive to the bottom. If cornered, they may flatten themselves and release a foul-smelling musk from glands near the base of their tail. If picked up, they may hiss and feign striking but rarely bite.
Due to their highly secretive nature, little is known about the population status of these water snakes in Oklahoma. But their dependence on aquatic habitats and crayfish may subject them to decline due to habitat loss and degradation.
#14. Red-sided Garter Snake
- Thamnophis proximus parietalis
- Normally dark green to black, but color varies.
- Three yellow stripes; one down the back and one down each side.
- As the name suggests, red or orange bars run along their sides between the yellow stripes.
- Subspecies of the Common Garter Snake.
Like other garter snakes, they are habitat generalists. Look for them in Oklahoma everywhere, including forests, shrublands, wetlands, fields, and rocky areas. Their favorite foods include frogs, earthworms, and leeches! YUM! 🙂
In some areas, after emerging from hibernation, there are not enough females for all the males. In these cases, “mating frenzies” occur, and dozens and dozens of these snakes can be found together.
To survive colder months, Red-sided Garter Snakes have to hibernate BELOW the frost line. Depending on the area they are located in, it can be hard to find suitable locations. So the few adequate hibernation dens can shelter hundreds, even thousands, of snakes! To see an example, watch the video below:
#15. Western Ribbon Snake
- Thamnophis proximus
- Adults range from 17 to 50 inches in length. A slender snake with a long tail!
- Coloration is blackish, brown, or olive with three light-colored stripes; one down the back and one down each side.
- The sides and top of the head are dark, and the upper lip is whitish.
Did you see a slender snake in Oklahoma with a long tail?
If so, it was probably a Western Ribbon Snake! This semi-aquatic species is rarely found far from a water source. They typically occupy brush-heavy areas around streams, lakes, ponds, and other water bodies. You may also spot them basking on rocks, flat vegetation, and dry sandy areas near water.
The Western Ribbon Snake has an incredible, unique hunting technique. As they move over land, they make quick, light thrusts of their head and upper body in different directions in sequences of three. It’s similar to a strike, but with their mouth closed. This action disturbs resting frogs, which alerts the garter snake to their location. From there, this snake uses its superior speed to catch its prey.
When they feel threatened, they flee into the water or hide in thick brush. Their coloration provides superb camouflage in dense, brushier areas. If grabbed, Western Ribbon Snakes rarely bite but will thrash around, defecate, and release musk from their anal glands. This species can also shed its tail to escape, but unfortunately, it doesn’t regenerate like some lizard species.
#16. Plains Garter Snake
- Thamnophis radix
- Adults average 36 inches in length.
- Coloration is gray-green with a distinctive orange stripe down the back and a greenish-yellow stripe down each side.
- Distinct light yellow spots on the very top of the head!
Plains Garter Snakes are found in the panhandle of Oklahoma in prairies and grasslands near freshwater sources. They have a fairly large population and adapt well to human-modified landscapes. You may spot them near abandoned buildings, trash heaps, or vacant lots.
This species is considered one of the most cold-tolerant of all snakes! In fact, they will even come out of hibernation on warmer winter days.
Plains Garter Snakes feed primarily on earthworms, slugs, and small amphibians. However, they have also been observed preying on small mammals and birds, including the Eastern Meadowlark and Bank Swallow.
#17. Black-necked Garter Snake
- Western Black-necked Garter Snakes are dark olive with an orange-yellow stripe down the back and a yellow to white stripe down each side. It can be up to 42 inches long.
- Eastern Black-necked Garter Snakes are smaller and only grow up to 20 inches in length. They have a checkered pattern of black and yellow on their body, between their three stripes.
- Both subspecies have a gray head, contrasting strongly with the body. In addition, there is a dark blotch on each side of the neck.
This species is found in many habitats, including desert scrub, plains, arid grasslands, and pine-oak woodlands. They’re almost always associated with water sources such as streams, ciénegas, and cattle tanks.
There are two subspecies of this snake: the Western AND Eastern. They look different (see photo above), but they also behave uniquely. The Western subspecies (Thamnophis cyrtopsis cyrtopsis) are water snakes and most often found in the water. The Eastern (Thamnophis cyrtopsis ocellatus) subspecies prefers to live on DRY LAND very close to water.
The Black-necked Garter Snake’s preferred prey is frogs, toads, and tadpoles, including poisonous species like the Sonoran Desert Toad. However, they have been known to feed on a wide range of other prey, including earthworms, skinks, salamanders, crustaceans, and birds.
#18. Eastern Milksnake
- Lampropeltis triangulum triangulum
- Adults typically range from 24 to 36 inches in length.
- Coloration is tan or gray with 3 to 5 rows of reddish-brown, black-edged blotches.
- Look for a gray or tan Y- or V-shaped mark near the rear of the head.
Eastern Milksnakes get their unique name from an old myth that they milked cows since they’re commonly found in barns! Obviously, this isn’t true. Instead, their presence inside barns is likely due to the high number of mice, some of their favorite prey.
Eastern Milksnake Range Map
A member of the kingsnake family, Eastern Milksnakes occupy a wide variety of habitats in eastern Oklahoma, including fields, woodlands, agricultural areas, and rocky outcrops. These beautiful snakes are somewhat secretive and spend much of their time beneath the ground. You may be able to find one underneath rocks, logs, boards, and other debris.
The Eastern Milksnake prefers to feed on small mammals such as mice and shrews. However, they’ll also consume various types of prey, including birds and bird eggs, lizards, snakes, amphibians, fish, earthworms, slugs, insects, and carrion.
Like other individuals in the kingsnake family, they will prey on venomous pit vipers. So how do they combat the venom? Interestingly, their blood contains venom-neutralizing properties!
#19. Prairie Kingsnake
- Lampropeltis calligaster calligaster
- Adults range from 30 to 40 inches in length.
- Coloration is typically gray or light brown with darker gray, brown, or reddish-brown blotching, sometimes outlined in black, down the length of their body that fades with age.
- They have a pale or yellowish underside, and their head is indistinct from their body.
- The Prairie Kingsnake is a subspecies of the Yellow-bellied Kingsnake.
Look for Prairie Kingsnakes in Oklahoma in open habitats, such as fields, farmland, rocky hillsides, and open woodlands. They spend most of their time underground and are found under rocks, logs, and old animal burrows throughout their active period and winter hibernation.
Prairie Kingsnake Range Map
These snakes feed on a wide variety of prey, like mice, lizards, other snakes (including other Prairie Kingsnakes), insects, birds, bird eggs, and amphibians. They constrict their prey, coiling around and suffocating it before consuming.
If disturbed, the Prairie Kingsnake may try to warn perceived threats by mimicking a rattlesnake. They accomplish this mimicry by shaking the tip of their tail in dry leaf litter. However, these snakes are non-venomous and don’t typically bite, but they will release a foul-smelling musk if grabbed!
This species is considered of least concern and doesn’t seem to face any significant conservation risks. However, they’re sometimes run over when crossing roads or killed because they are mistaken for being venomous. Like many other kingsnakes, this species is sometimes kept as pets.
#20. Speckled Kingsnake
- Lampropeltis holbrooki
- Adults are typically 36 to 48 inches in length.
- Coloration is shiny black with small yellow, yellowish-green, or white specks, one in the center of almost every dorsal scale though the pattern of the speckles varies by individual.
- The underside is white or yellow with clusters of black checkers and is sometimes more black than white.
The Speckled Kingsnake’s unique appearance resulted in the nickname “salt and pepper snake.” Look for them in fields along the forest’s edge, prairies, grasslands, stream valleys, pastures, and roadside ditches.
Speckled Kingsnake Range Map
These snakes are rather secretive and hard to find in Oklahoma!
In addition, they’re primarily nocturnal. As a result, they’re most frequently spotted crossing roadways in the morning or evening.
Like other kingsnakes, this species is a constrictor, which means they use their coils to asphyxiate their prey before consuming it. They feed on a wide variety of prey, including rodents, birds, bird eggs, reptiles, reptile eggs, frogs, and other snakes, including venomous species. SEE THE VIDEO BELOW! 🙂
Speckled Kingsnakes are generally quite docile and are often kept as pets. However, if disturbed, they may shake their tail, release a foul-smelling musk, and strike if grabbed. Sadly this species is considered threatened in parts of their range.
#21. Western Milksnake
- Lampropeltis gentilis
- Adults typically range from 15 to 34 inches in length.
- Coloration is whitish, black, and reddish or orange bands, with the reddish-orange bands being bordered by black.
- The snout is blackish and sometimes features white flecking, and the underside may have extensions of the bands or be more whitish.
Western Milksnakes are found in Oklahoma in open sagebrush, grasslands and are occasionally seen in suburban areas. They’re a secretive species frequently found under objects like rocks, logs, boards, and other debris.
Western Milksnake Range Map
Because of their coloration, they are often confused with venomous coral snakes. But luckily, there’s an easy way to tell the difference. Just remember this rhyme:
“If red touches yellow, you’re a dead fellow; if red touches black, you’re all right, Jack.”
These snakes aren’t picky about food and feed on small mammals, birds, bird eggs, other snakes, lizards, reptile eggs, and occasionally, worms and insects. They actively hunt down their prey and use their coils to constrict the life out of them.
Though they’re usually docile when handled, Western Milksnakes do exhibit strong defensive behaviors when disturbed. You can expect them to vibrate their tail (like a rattlesnake), and they may even rear up and strike!
#22. Great Plains Ratsnake
- Pantherophis emoryi
- Adults range from 36 to 60 inches long.
- Coloration is light gray or tan with dark gray, brown, or green-gray blotching down its back.
- A spear-shaped mark on the head and stripes on the sides of the head that meet to form a point between the eyes.
- Also sometimes called Emory’s Ratsnake, Brown Ratsnake, or Chicken Snake.
Great Plains Ratsnakes are found in Oklahoma in open woodlands, rocky, wooded hillsides, semi-arid regions, and agricultural areas. Being nocturnal, they are hard to find and spend most of their days in old mammal burrows or under rocks, logs, boards, and other cover objects.
This species prefers to prey on rodents but may also consume small birds, lizards, and frogs. They are also known to eat bats and are sometimes found near caves hunting them! Like other rat snakes, they’re constrictors and use their strong coils to suffocate prey before eating it.
When disturbed, the Great Plains Ratsnake curls up and vibrate its tail which sounds remarkably like a rattlesnake when done in dry leaf litter. Though they’re considered non-aggressive and docile, they may strike if grabbed.
#23. Western Ratsnake
- Pantherophis obsoletus
- Adults range from 42 to 72 inches in length though individuals up to 101 inches have been recorded.
- Coloration varies. Adults can be completely black to gray to pale brown to yellowish with black, brown, or gray blotches.
- Also commonly called the Texas Ratsnake!
Western Ratsnakes occupy various habitats in Oklahoma, including agricultural areas, dense woodlands, forested river valleys, and rocky hillsides. They’re excellent climbers and are found often in trees and will frequently use cavities in trees for shelter.
Western Ratsnakes are active hunters and constrictors preying on small mammals, nestling birds, bird eggs, tree frogs, and lizards. They suffocate larger prey with their coils but often swallow smaller prey without constriction.
When disturbed, these snakes often freeze to avoid detection. If harassed, they’ll raise their heads and vibrate their tails to mimic a rattlesnake. And if they continue to be provoked or grabbed, they’ll strike their attacker as a last defense.
- Cemophora coccinea
- Adults range from 14 to 26 inches in length.
- Coloration is red with light gray, yellowish, or white bands with black borders.
- Small, pointed red head with a light-colored band behind the eyes and light gray or white underside.
These beautiful snakes are found in small pockets in Oklahoma in pine flat woods, dry prairies, hardwood hammocks, sandhills, and open woodlands. They are burrowers and prefer areas with loose, sandy soil, leaf litter, logs, and other material they can easily hide beneath.
There are THREE subspecies of Scarletsnake, and they all look similar. You would need to be a trained herpetologist to tell the difference!
The Scarletsnake is non-venomous, but it’s sometimes confused with venomous coral snakes. An easy way to tell the difference between the two species is to remember the rhyme, “Red touches yellow, kill a fellow; red touches black, a friend of Jack.”
Incredibly docile, these snakes rarely bite even when picked up by humans. But even though they’re common throughout their range, it’s rare to actually see one. Scarletsnakes are very secretive and spend most of their time hidden.
#25. Rough Greensnake
- Opheodrys aestivus
- Adults typically range from 22 to 36 inches in length.
- Coloration is bright green with a yellow or whitish underside.
- SLENDER bodies and large eyes.
- Also commonly called a Grass Snake.
This species is hard to mistake for any other snake in Oklahoma!
Their bright green color makes for excellent camouflage against the foliage. They’re highly arboreal and spend much of their time climbing in low vegetation. Look for them coiled and sleeping in shrubs, tangles of vines, or other thick vegetation, especially if it’s near water.
When disturbed, Rough Greensnakes typically freeze and rely on their camouflage. They’re nonvenomous and generally very docile, seldom striking even if grabbed.
The Rough Greensnake is fairly common, but they do face several threats. They’re one of the most exploited pet snake species in North America. They’re also often killed on roads and face habitat loss, especially when small waterways are cleared of vegetation in developing areas.
- Pituophis catenifer sayi
- Adults are large and typically range from 4 to 6 feet in length.
- Coloration is yellow, beige, or light brown with large brown, black, or reddish blotching on the back and three sets of small blotches on the sides.
- Blotches may appear like bands near the end of the tail, and the underside is yellowish with black spots.
Bullsnakes are often seen in Oklahoma in areas with high rodent populations.
So they’re common in places like prairie dog towns. But you can also find them in fields, grasslands, forest edges, savannas, and brushlands with sandy soils.
Bullsnakes are fast and can actively pursue prey in loose soil. They even use their prominent rostral (nose scale) to dig! Once they’ve captured their prey, they use their strong body to coil around and constrict their prey.
Despite being nonvenomous, these snakes act aggressively toward any threats. They often lift the front half of their body, hiss, and lunge at their attacker until they feel they can retreat.
Interestingly, their hissing can sound like a rattle! (see below!)
To accomplish this, the snake forces air through an extension of the windpipe, which has a piece of cartilage called an epiglottis that flaps back and forth, sounding very similar to a rattlesnake.
#27. Plains Hog-nosed Snake
- Heterodon nasicus
- Adults range from 15 to 39 inches in length.
- Coloration is varying shades of brown with darker brown blotches on the back, two alternating rows of smaller dark spots down the sides, and large longitudinal blotches on the sides of the neck.
- Enlarged rostral (nose) scale.
The Plains Hog-nosed Snake strongly prefers open sandy or gravelly habitats. They’re excellent burrowers and also use old animal burrows for hibernation and protection from hot temperatures.
These snakes are best-known for their impressive displays when disturbed!
When initially confronted, Plains Hog-nosed Snakes typically remain motionless or hide their head under their coils. They may also try to bury themselves or escape into a burrow.
However, if they’re further disturbed, they’ll spread their jaws and neck like a cobra and puff up their bodies. They may also hiss loudly and deliver false strikes with a closed mouth.
If these intimidating displays fail, the Plains Hog-nosed Snake will then twist as though they’re in pain, roll over on their back and play dead. They’ll be limp, open mouthed, and will remain this way even if picked up. They may also bleed from the mouth and cloaca, expel musk and fecal matter, and regurgitate recently eaten food.
If I saw one of these snakes do this display, I’d definitely leave it alone! But, unfortunately, they’re sometimes killed by people who are frightened by their cobra-like posture.
#28. Eastern Hog-nosed Snake
- Heterodon platirhinos
- Adults typically range from 20 to 30 inches in length.
- Coloration can be yellow, gray, brown, black, olive, or orange, often with darker blotches or spots down its side and back, though solid gray and black individuals are fairly common.
- Thick-bodied, broad, triangle-shaped heads, and an upturned snout.
Eastern Hog-nosed Snakes prefer areas in Oklahoma with sandy soil.
Eastern Hog-nosed Snakes primarily prey on toads and use their upturned snout to dig for them in their burrows. They also have enlarged teeth at the rear of the upper jaw that they use to puncture and deflate toads that puff up when threatened. These snakes also have large adrenal glands, which secrete large amounts of hormones to counteract the toad’s potent skin poison!
When disturbed, Eastern Hog-nosed Snakes lift their head off the ground and flatten their neck like a cobra! They may also hiss and false strike with a closed mouth.
If this display fails to scare off a predator, then the snake will play dead. They’ll roll onto their back, let their tongue hang out, and emit musk from glands near the base of their tail. Interestingly, when the threat has left, the snake will right itself and continue as normal. 🙂
#29. Dekay’s Brownsnake
- Storeria dekayi
- Adults typically range from 6 to 13 inches in length.
- Coloration is light brown or gray to dark brown or black with two rows of dark spots down the back, which are sometimes linked.
- A dark streak down the head and may have a light stripe down the center of the back.
Dekay’s Brownsnakes occupy various terrestrial habitats as long as there’s plenty of cover available such as rocks, logs, boards, and all sorts of trash and organic debris. They’re often found in backyards and gardens under objects.
These secretive, nocturnal snakes hunt during the evening and night, feeding primarily on slugs and earthworms. However, they’ve also been known to consume snails, insects, insect larvae, small tree frogs, tadpoles, frog eggs, spiders, and fish. Prey is typically grabbed and quickly swallowed alive.
These docile snakes usually don’t bite in defense. Instead, if captured, they often squirm vigorously or flatten their bodies and may release foul-smelling musk from glands near the base of their tail.
This species is considered common in most of its range and is not a major conservation concern. It adapts well to human development and has a reputation as a “city snake.” However, pesticide usage and clean-up of cover objects may reduce their populations in urban areas by reducing their habitat and food source.
#30. Texas Coral Snake
- Micrurus tener
- Adults typically range from 20-30 inches in length.
- Red and black banding with narrower bands of yellow in between.
- Smooth scales and black-colored specks within red bands.
The Texas Coral Snake was once considered to be a subspecies of the Eastern Coral Snake. Although it looks similar and shares the same coloration, it is slightly longer and thicker than its eastern cousin.
These venomous snakes are rarely seen in Oklahoma.
They are nocturnal and spend most of their time hiding underground or beneath leaf litter or rotting logs. Your best chance to see a Texas Coral Snake is on a warm rainy night when the temperature remains above 78°F.
Texas Coral Snakes are sometimes confused with Scarlet Snakes and Scarlet King Snakes, both of which are entirely harmless. To help distinguish these species, you may use the following rhyme, “Red next to black, safe from attack; red next to yellow, you’re a dead fellow.“
This interesting snake feeds almost exclusively on other snakes, with Thread snakes being their most favorite victims, though skinks may also be consumed. Like other coral snakes, this species is venomous and has a potent neurotoxin that is used to immobilize and kill prey.
#31. Western Pygmy Rattlesnake
- Sistrurus miliarius streckeri
- Adults are small and range from 1 to 1.5 feet in length.
- Pale gray or brown. Dark spots that are irregular in shape.
- Thick body, dark bands that run from the corners of the eyes to the jaw, a small rattle prone to breaking, and elliptical pupils.
- Western Pygmy Rattlesnakes are subspecies of the Pygmy Rattlesnake (Sistrurus miliarius).
This species is the smallest venomous snake found in Oklahoma!
Western Pygmy Rattlesnakes occupy a wide variety of habitats. Naturally, they can be found in pine forests, dry upland forests, floodplains, sandhills, and near lakes, rivers, and marshes. They are often encountered in urban areas and may be seen in gardens and brush piles.
These venomous snakes are rarely seen in Oklahoma because they are so small and well camouflaged. When they are found, they typically remain silent and motionless and rely on blending into their environment.
It’s rare to hear them rattle. When they do, it sounds more like a faint insect and can be hard to hear unless you’re within a few feet of one.
Due to their small size, a bite typically isn’t fatal to healthy adults and is considered less severe than the bite of most other venomous snakes. But make no mistake, these snakes’ cytotoxic venom can cause pain and necrosis for a few days.
#32. Texas Garter Snake
- Thamnophis sirtalis annectens
- Adults range from 15 to 28 inches in length.
- Coloration is greenish-black.
- Dark orange or red stripe down the back and a yellowish stripe down each side.
- Subspecies of the Common Garter Snake.
Texas Garter Snakes are hard to find in Oklahoma!
Even in their range, they are relatively uncommon, and you will seldom find them in large numbers. When Texas Garter Snakes are located, it’s typically near fresh water in damp sand or dense vegetation. They look incredibly similar to Eastern and Red-sided Garter Snakes, except for the distinctive red stripe that runs down their back!
They’ll use various places for cover, including logs, stones, plants, underground burrows, and human garbage like old metal and boards. They use these spots for protection from predators and to help them thermoregulate.
Texas Garter Snakes are harmless and less aggressive than other garter snake species. They rarely bite, except for young snakes, when they feel threatened. Adults most likely will just defecate and release foul-smelling musk from their anal glands onto your hands!
#33. Checkered Garter Snake
- Thamnophis marcianus
- Adults are typically 18 to 24 inches in length.
- Coloration is typically greenish. They have three yellow or orange stripes; one down the center of the back and one down each side.
- Look for a distinctive black checkerboard pattern on its back.
- Cream or yellow crescent marks on each side of the head are followed by a dark blotch on the neck.
The Checkered Gartersnake is most commonly found in western Oklahoma in desert and grassland habitats. Look for them near water sources, such as rivers, lakes, wetlands, cattle tanks, canals, and ditches. Living in arid conditions, these garter snakes are incredibly good at finding water sources.
Checkered Gartersnakes are opportunistic predators who feed on a wide variety of prey. They typically consume frogs, salamanders, toads, earthworms, small fish, lizards, snakes, slugs, and crayfish. However, they’ve also been reported to eat mice, raw horse meat, and other snakes of their own species in captivity!
Their populations are not currently threatened. Luckily, they tolerate human development relatively well, although draining wetlands and other water sources harm their population. These garter snakes are also able to co-exist with introduced species like the American Bullfrog.
Do you need additional help identifying snakes in Oklahoma?
Try this field guide!
Which of these SNAKES have you seen before in Oklahoma?
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