11 Types of SNAKES That Live in Oregon! (ID Guide)
There are A LOT of snakes in Oregon!
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 Oregon 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 11 types of snakes in Oregon!
#1. Terrestrial Garter Snake
- Thamnophis elegans
- Adults range from 18 to 41 inches in length.
- Most adults have three yellow, light orange, or white stripes; one down their back and two down their sides.
- Coloration is widely variable. Individuals may be brownish or greenish. Some have red and black spots between the stripes, and occasionally all black individuals are found.
This snake can be difficult to identify in Oregon!
Even trained herpetologists have issues! Its coloration varies widely, and there are believed to be 6 subspecies, although scientists still debate this.
Terrestrial Garter Snakes occupy various habitats, including both grasslands and forests. They can even be found in mountainous areas up to 13,000 feet above sea level. As the name suggests, they’re primarily found on land. But interestingly, these garter snakes are great swimmers!
This species is the only garter snake in Oregon with a tendency to constrict prey! Most garter snakes grab their prey quickly and just swallow, rubbing their prey against the ground if necessary.
Terrestrial Garter Snakes aren’t aggressive or dangerous, but they do possess mildly venomous saliva! It can cause a muscle infection or even kill some muscle tissue. Most bites on humans just cause pain and some swelling.
#2. Valley Garter Snake
- Thamnophis sirtalis fitchi
- Adults range from 18 to 55 inches in length.
- Coloration is brown to black with three yellow stripes: one down the back and one down each side.
- Pronounced red bars between the yellow stripes. Yellowish chin, jaw, and belly, and a black head, which often has red sides.
- Subspecies of the Common Garter Snake.
Valley Garter Snakes are found in various habitats, including forests, wetlands, scrublands, fields, shorelines, and rocky areas. They’re also well adapted to humans and are often found in urban areas.
Look for these snakes in Oregon under rocks, logs, and other objects, which they use for cover and thermoregulation. During the winter, they hibernate, often communally, below the frost line. They will use a variety of underground cavities, including mammal and crayfish burrows, rock crevices, ant mounds, and manmade spaces such as foundations and cisterns.
When disturbed, Valley Garter Snakes try to escape into the water and are excellent swimmers. If captured, be prepared for them to release musk and feces onto your hands! They may also strike, but only if they feel extremely threatened.
The Valley Garter Snake is considered a species of low risk in Oregon. They are quite common and adapt well to human-modified habitats. However, they are frequently killed on roadways and are sometimes killed out of fear.
#3. California Kingsnake
- Lampropeltis californiae
- Adults range from 36 to 48 inches in length.
- Most individuals are black or brown, with whitish bands running down their bodies.
These snakes are widespread across many types of habitats in southwest Oregon.
Look for them in woodlands, grasslands, marshes, and even suburban areas! Most of the year, these California Kingsnakes are found out during the day, except during cold weather when they retreat underground to enter a hibernation-like state called brumation.
California Kingsnake Range Map
Do you know how kingsnakes got the name “king?”
It refers to their ability to hunt down and eat other snakes! Incredibly, California Kingsnakes will even go after venomous rattlesnakes.
This species has the incredible adaptation to constrict its prey. In fact, California Kingsnakes have the strongest squeeze when compared to the size of their body! It’s thought they evolved this trait since their main diet consists of other reptiles, which don’t require as much oxygen as mammals.
#4. Western Rattlesnake
- Crotalus oreganus
- Adult size varies widely over their range, with the largest individuals being 6 feet in length.
- Two subspecies live in Oregon – Northern Pacific and Great Basin.
- Triangular head, heat-sensing pits between the eyes and nostrils, dark stripe with white borders that runs from the eye towards the jaw.
You can find two different subspecies of the Western Rattlesnake in Oregon, and they look completely different. The Northern Pacific variety is dark brown or black with lighter-edged blotches. Great Basin Rattlesnakes are typically pale yellow, light gray, or tan, with brown and blackish blotches.
Western Rattlesnake Range Map
This venomous species occupies a wide range of habitats in Oregon. They can be found in mountainous areas, woodlands, and grasslands. They also often occur in close proximity to humans.
These snakes may be active during the day or night and are often curled, waiting to ambush a variety of prey. They’ll feed on small mammals, birds, reptiles, and amphibians. They may also eat bird eggs, and young snakes often feed on insects.
Like other rattlesnakes, this species gives birth to live young. Healthy, sexually mature females can give birth to litters of up to 25 babies!
#5. Aquatic Garter Snake
- Thamnophis atratus
- Adults range from 18 to 40 inches in length.
- Coloration varies greatly depending on location and subspecies.
- They may be pale grey with alternating rows of dark blotches on the sides, dark brown with less distinct borders, or nearly all black.
- May have a yellow stripe down the back or on the neck.
The Aquatic Garter Snake occupies various habitats in southwestern Oregon, including brushlands, woodlands, grasslands, and forests. But, as the name suggests, they are always near a water source such as a pond, marsh, stream, or lake.
These snakes prey on fish, salamanders, toads, and newts. They don’t constrict their prey but may use their body to encircle it in shallow water and then strike to prevent it from escaping.
Aquatic Garter Snakes feel the safest in the water. If they feel threatened or need to escape, they flee as quickly as possible to the nearest source of water!
#6. Northwestern Garter Snake
- Thamnophis ordinoides
- Adults average between 12 and 24 inches in length.
- COLORATION IS HIGHLY VARIABLE. Individuals can be blackish, olive, brownish, bluish, or gray, sometimes with a reddish tint.
- Typically has three stripes, one down the back and one down each side. The color of these stripes can be red, yellow, orange, tan, white, greenish, or blue; however, on certain snakes, the stripes may be dull, narrow, or absent!
The Northwestern Garter Snake prefers damp areas in western Oregon with lots of vegetation and open sunny areas. They may be spotted near houses and are often found when moving boards, logs, or other objects that they use for cover.
This species is predominantly terrestrial. However, these garter snakes can swim, and some local individuals have been observed hunting in the water! They feed mainly on slugs and earthworms, but they also prey on snails, small amphibians, and possibly fish.
The Northwestern Garter Snake will typically flee into dense vegetation if disturbed. One study found that individuals with stripes usually move away quickly because their stripes make it difficult for predators to determine their speed. But plain or spotted individuals frequently freeze while fleeing because their excellent camouflage helps them blend in while they’re motionless.
#7. California Mountain Kingsnake
- Lampropeltis zonata
- Adults typically range from 20 to 50 inches in length.
- Coloration is bands of black, red, and off-white or grayish-white. Red bands, bordered by black bands are the widest.
- The snout is typically black but may have some red.
The California Mountain Kingsnake is a habitat generalist. They’ll occupy various habitats, including coniferous forests, pine-oak woodlands, riparian woodlands, chaparral, manzanita, and coastal sage scrub. They prefer wooded areas near streams, rocky outcrops, or rotting logs that provide cover.
These snakes are constrictors that feed on a wide variety of prey. Lizards, amphibians, nesting birds, bird eggs, and other snakes (including their own species) make up most of their diet.
These secretive snakes spend much of their time in southwest Oregon under objects like logs, underground, or in rock crevices.
Though brightly colored, they are non-venomous.
#8. North American Racer
- Coluber constrictor
- Adults typically range from 50 to 152 cm (20 to 60 in) in total length
- The patterns and texture of their skin vary widely among subspecies. However, most are solid-colored and have a lighter-colored underbelly.
True to their name, North American Racers are one of the FASTEST snakes in Oregon!
When they get moving, they can speed away at up to 3.5 miles per hour (5.6 kph). These active snakes are curious and have excellent vision. In fact, they are known to raise their heads above the height of the grass to view their surroundings.
Despite their scientific name (constrictor), North American Racers do not squeeze their prey to death. Instead, they subdue their victim by holding it down with their body. Smaller prey is simply swallowed alive.
North American Racer Range Map
These nonvenomous snakes fight back incredibly hard if they feel threatened or become trapped. You can expect them to bite, thrash, defecate, and release a foul-smelling musk, especially if you try holding one. In addition, racers will try to impersonate rattlesnakes by shaking their tails in dry leaves.
North American Racers are still abundant in many places. But they face threats as they are losing habitat to urbanization and development. Unfortunately, many people also kill them out of fear, even though they are completely harmless, especially if you leave them alone.
#9. Ring-necked Snake
- Diadophis punctatus
- These snakes are usually solid olive, brown, bluish-gray, or smoky colored. Look for a distinctive yellow or red neckband.
- The snake’s head color is usually slightly darker than the rest of the body, tending towards black rather than gray or olive.
- Adults are usually between 25-38 cm (10-15 in) long.
It can be hard to find these snakes in Oregon!
That’s because Ring-necked Snakes are VERY secretive and spend most of their time hiding in areas with lots of cover. In addition, they are nocturnal and rarely seen during the day.
Ring-necked Snake Range Map
The colors represent the different subspecies of Diadophis punctatus.
If you come across one, you may see its unique defense posture. Red-bellied Snakes will curl their tails and expose their bright red-orange bellies when they feel threatened in hopes of scaring you away.
Ring-necked Snakes mostly eat small salamanders, earthworms, and slugs. Not much is known about their population status because they are so hard to find!
#10. Striped Whipsnake
- Masticophis taeniatus
- Adults are between 30-72 inches (76-183 cm) in total length.
- The coloration on their back is black, dark brown, or gray with an olive or bluish tint.
The Striped Whipsnake can be found in a diverse range of habitats in Oregon.
Look for them in such places as grasslands, shrublands, woodlands, canyons, and open pine-oak forests. They can even be found in the mountains!
Striped Whipsnakes are active and alert during the day. They are incredibly fast and prey on a wide range of species, including lizards, small mammals, young birds, frogs, insects, and other snakes (including venomous rattlesnakes).
These snakes are nonvenomous and pose no danger to humans. Their two main threats are the loss of natural habitat due to expanding agriculture and vehicle collisions.
#11. Northern Rubber Boa
- Charina bottae
Also known as the Coastal Rubber Boa.
- Adults are between 38-84 cm (1.25 to 2.76 ft.) long.
- They have smooth and shiny scales, and their skin is typically tan to dark brown with a lighter belly.
- One of the most noticeable features of rubber boas is their short and blunt tails, which are often confused for their heads.
As the name suggests, rubber boas get their name from their loose, wrinkled skin that looks and feels like rubber.
Northern Rubber Boas can thrive in diverse habitats in Oregon, ranging from grasslands, meadows, and chaparrals to deciduous and coniferous forests and high alpine environments. One place you WON’T find this snake is in hot and dry areas, as they cannot tolerate higher temperatures.
The best place to find one is typically under shelter, such as rocks, logs, leaf litter, and burrows.
Northern Rubber Boas are often used to assist individuals in overcoming their fear of snakes. These gentle snakes never attempt to strike or bite humans under any circumstances. However, on rare occasions, they might emit a strong musk from their vent if they sense danger.
Do you need additional help identifying snakes in Oregon?
Try this field guide!
Which of these SNAKES have you seen before in Oregon?
Leave a comment below!
Also, if you enjoy this article, make sure to check out these other Oregon guides!
7 FROGS Found in Oregon! (ID Guide)
7 Types of TURTLES in Oregon! (Both aquatic and land)
11 Kinds of LIZARDS That Live in Oregon!
Seen Rubber Boa along Scappoose Creek
In Portland, only garter snakes – Never seen nor expected to see any poisonous in this area, though have seen multiple rattlesnakes hiking in other areas of Oregon. I’ve also never seen a rubber boa, which I’m told is around here.