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Species Profile

Great Plains Rat Snake

Pantherophis emoryi

Prairie-edge rodent control, no venom needed
Matt Jeppson/Shutterstock.com

Great Plains Rat Snake Distribution

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Great Plains rat snakes are non-venomous with a timid nature.

At a Glance

Wild Species
Also Known As Emory's rat snake, Emory's ratsnake, Plains rat snake, Chicken snake
Diet Carnivore
Activity Crepuscular+
Lifespan 10 years
Weight 1 lbs
Status Least Concern
Did You Know?

Adults are typically 91-152 cm long; the largest reported individuals reach about 178 cm. (Ernst & Ernst, 2003)

Scientific Classification

A nonvenomous North American colubrid commonly called the Great Plains ratsnake; a medium-to-large constrictor known for blotched patterning and adaptability to a variety of habitats across the central United States.

Kingdom
Animalia
Phylum
Chordata
Class
Reptilia
Order
Squamata
Family
Colubridae
Genus
Pantherophis
Species
emoryi

Distinguishing Features

  • Nonvenomous constrictor in family Colubridae
  • Typical pattern includes darker dorsal blotches on a lighter background, often becoming less distinct toward the tail
  • Central U.S. distribution associated with Great Plains region
  • Frequently encountered near farms/structures where rodents are present

Did You Know?

Adults are typically 91-152 cm long; the largest reported individuals reach about 178 cm. (Ernst & Ernst, 2003)

Hatchlings are usually about 25-38 cm at emergence, already patterned like small "mini adults." (Ernst & Ernst, 2003)

It kills prey by constriction and then swallows it head-first-most often small mammals, making it a helpful natural form of rodent control.

Like many Pantherophis, it's a strong climber and will use shrubs, trees, barns, or rock ledges-despite being a classic "prairie" snake.

Defensive displays often include vibrating the tail in dry leaves (a convincing 'buzz'), striking, and releasing a strong musk.

Reproduction is egg-laying; published clutch sizes span roughly 5-29 eggs in the species. (Ernst & Ernst, 2003)

Its blotched pattern is frequently mistaken for venomous snakes, but it is nonvenomous and lacks a rattle and heat-sensing pits.

Unique Adaptations

  • Cryptic blotching for prairie-edge camouflage: the tan/gray ground color with darker dorsal blotches breaks up the body outline in grasses, leaf litter, and patchy shade.
  • Flexible habitat use: tolerates open prairie edges, brushland, riparian woods, rocky breaks, and agricultural landscapes-helping it persist across the central Great Plains.
  • Powerful, nonvenomous feeding toolkit: rearward-curving teeth plus strong body coils enable efficient constriction and secure swallowing of furry prey.
  • Climb-and-burrow versatility: muscular body and ventral scutes provide traction for both climbing rough surfaces and moving through debris/burrows.
  • Checkerboard belly pattern: high-contrast ventral markings can confuse predators during escape when the snake twists and rolls.

Interesting Behaviors

  • Seasonal activity shift: more diurnal in cooler spring/fall, more crepuscular/nocturnal in hot midsummer conditions (typical of central U.S. colubrids in open habitats).
  • Tail-vibration defense: rapidly shakes the tail against leaf litter or dry grass to create a buzzing sound; may also coil tightly and strike repeatedly when cornered.
  • Opportunistic sheltering: readily uses rodent burrows, rock crevices, hollow logs, and human structures (old barns, boards, stacked lumber).
  • Climbing and "edge patrolling": commonly hunts along habitat transitions-prairie to woodland/brush line, riparian corridors, and farm margins-where rodents concentrate.
  • Scent-trailing: uses tongue-flicking and the vomeronasal organ to follow prey trails and locate nests (bird eggs/young are taken opportunistically).
  • Brumation: in colder parts of its range it overwinters in protected refuges (burrows/rock dens), emerging as temperatures rise.

Cultural Significance

Great Plains ratsnake (Pantherophis emoryi) is a common farm and field snake that eats rodents around barns, grain stores, and prairie-edge crops. Nonvenomous, it is used in education and shares Pantherophis traits: constriction, climbing, stays in the same area.

Myths & Legends

In rural central and southern U.S., ratsnakes like the Great Plains ratsnake (Pantherophis emoryi) were called "chicken snakes" with tales of raiding henhouses and "hypnotizing" hens, though they mostly eat rodents near feed and grain.

House-and-barn guardian beliefs: Settler-era and farm-country traditions often tolerated large ratsnakes in barns as unofficial guardians against rats and mice, reflecting a practical folklore that a big, nonvenomous snake meant fewer crop and feed losses.

Emoryi honors U.S. Army officer and surveyor William H. Emory. Great Plains ratsnake refers to prairies and prairie edges where it was seen during 1800s central U.S. exploration and settlement.

In rural North America, Great Plains Ratsnake (Pantherophis emoryi) was often blamed for stealing milk from cows or eating eggs; these stories spread where ratsnakes lived and changed how people felt about them.

Conservation Status

LC Least Concern

Widespread and abundant in the wild.

Population Stable

Life Cycle

Birth 12 hatchlings
Lifespan 10 years

Lifespan

In the Wild
5–15 years
In Captivity
10–21 years

Reproduction

Mating System Polygynandry
Social Structure Solitary
Breeding Pattern Seasonal
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Great Plains ratsnakes (Pantherophis emoryi) are solitary and meet in spring to mate. They are polygynandrous (both sexes may mate with multiple partners). Females lay mid-single-digit to low-ten egg clutches in hidden sites. No parental care; genetic details unclear.

Behavior & Ecology

Social Hibernation aggregation Group: 1
Activity Crepuscular, Nocturnal, Diurnal
Diet Carnivore Small mammals-especially mice and other rodents
Seasonal Hibernates

Temperament

Secretive/cryptic; tends to flee to cover when disturbed
Defensive when handled or cornered: may strike, bite, and release cloacal musk/feces
Tail vibration (especially in leaf litter) and body inflation/flattening may be used as intimidation displays
Generally nonaggressive toward conspecifics outside of breeding interactions; no evidence of cooperative hunting or stable social hierarchy

Communication

Hissing Expelled-air defensive sound; no true vocal cords
Chemical/chemosensory signaling via pheromones (mate location; following scent trails) using tongue-flicking and the vomeronasal (Jacobson's) organ
Tactile communication during courtship and copulation Body alignment, cloacal contact
Visual threat displays S-shaped neck posture, body flattening
Substrate-borne vibration (tail vibration) as a defensive signal

Habitat

Biomes:
Temperate Grassland Temperate Forest Desert Hot Freshwater Wetland
Terrain:
Plains Hilly Plateau Valley Riverine Rocky Sandy +1
Elevation: Up to 7874 ft

Ecological Role

Mid-level terrestrial predator (mesopredator) in grassland, scrub, woodland edges, and agricultural mosaics; also serves as prey for larger vertebrates.

Rodent population suppression (reduces damage to crops/stored feed and limits rodent irruptions) Energy transfer from small-mammal and bird communities to higher trophic levels (as prey for raptors, mesocarnivores, and larger snakes) Potential indirect disease-risk reduction by lowering densities of some rodent reservoir hosts in human-modified landscapes

Diet Details

Main Prey:
Small mammals Birds Bird eggs Lizards Amphibians

Human Interaction

Domestication Status

Wild

Status: wild (not domesticated). Pantherophis emoryi is often captive-bred but not domesticated. People often hurt or kill them because they mistake them for dangerous snakes; they die on roads or when land is changed; they help farms by eating rodents; and they are collected for education, research, and the pet trade, now more captive-bred.

Danger Level

Low
  • Nonvenomous: no medically significant venom; primary risk is a defensive bite (puncture/laceration) if handled or cornered
  • Musk/fecal discharge when stressed (common colubrid defense)
  • Zoonotic risk typical of reptiles (e.g., Salmonella) if hygiene is poor-wash hands after handling and keep away from food-prep areas
  • Rare secondary risks: bacterial infection from bites if not cleaned; allergy/asthma irritation from enclosure substrates/dander in sensitive individuals

As a Pet

Suitable as Pet

Legality: Great Plains Ratsnake (Pantherophis emoryi) is usually legal to keep as a nonvenomous, often captive-bred pet in many U.S. areas and is not CITES-listed. Wild collection may need permits or be banned; check state and local rules.

Care Level: Easy

Purchase Cost: $50 - $250
Lifetime Cost: $1,200 - $3,500

Economic Value

Uses:
Ecosystem service (rodent control) in agricultural/ranch and peri-domestic settings across its range Herpetoculture/pet trade (primarily captive-bred animals; occasional demand for locality types) Education and outreach (nature centers, classrooms, live-animal programs) Scientific research and museum vouchering (taxonomy/phylogeography, ecology, natural history) Human-wildlife conflict interactions typical of ratsnakes (nuisance removals from barns/attics; persecution; road mortality)
Products:
  • Live captive-bred individuals for the pet market
  • Educational programming/interpretive use (live animal ambassador animals)
  • Non-market agricultural benefit via predation on pest rodents

Relationships

Predators 10

Red-tailed Hawk Buteo jamaicensis
Swainson's Hawk
Swainson's Hawk Buteo swainsoni
Great Horned Owl Bubo virginianus
Roadrunner
Roadrunner Geococcyx californianus
American Crow Corvus brachyrhynchos
Raccoon
Raccoon Procyon lotor
Striped Skunk Mephitis mephitis
Coyote
Coyote Canis latrans
Virginia Opossum Didelphis virginiana
Prairie Kingsnake Lampropeltis calligaster

Ecological Equivalents 4

Animals that fill a similar ecological role in their ecosystem

Bullsnake
Bullsnake Pituophis catenifer sayi Occurs across the Great Plains in open habitats (prairie, farmland edges, sandy soils). Like Pituophis emoryi, it is terrestrial and uses burrows, is a constrictor that feeds mainly on rodents, and serves a similar nonvenomous predator role.
Prairie Kingsnake Lampropeltis calligaster Occurs in many of the same central U.S. grassland and field-edge habitats and has similar foraging habits, preying on small mammals, birds and eggs, and other small vertebrates. Ecologically comparable as a medium-sized, nonvenomous colubrid in agricultural and prairie mosaic landscapes.
Western Foxsnake Pantherophis vulpinus Closely related ratsnake occupying prairie/grassland-agricultural mosaics (especially farther north). Occupies a similar niche as a diurnal/crepuscular constrictor that feeds heavily on rodents and nesting birds around fields, fencerows, and riparian corridors.
Gopher Snake
Gopher Snake Pituophis catenifer In open habitats such as grasslands, shrublands, and farmlands, it fills a very similar role: an active rodent predator that often uses burrows and edge habitats. There is functional niche overlap with P. emoryi where their ranges approach or where habitat types match.

“This snake vigorously shakes its tail as a way to frighten away predators”

Normally, the Great Plains rat snake is two to three feet in length. However, there are some that grow to a size of five feet! These snakes have a diet of rodents, birds, and bats. They live in a plains and grassland habitats as well as in rocky or brush-filled environments. Great Plains rat snakes are non-venomous with a timid nature.

3 Great Plains Rat Snake Amazing Facts!

  • It coils up and shakes its tail in an effort to scare away threats
  • A juvenile Great Plains rat snake looks almost identical to a juvenile black racer snake
  • It constricts its rodent, bird, or bat prey

Where to Find Great Plains Rat Snakes

This snake lives in North America. In the United States, its range stretches from Missouri west to Nebraska, up to Colorado, and down into Texas. This snake is also found in the northern and central areas of Mexico.

It lives in a brush-filled, grassland, or plains habitat. Some are found on a rocky area of ground. They hide under sticks and debris or retreat into a burrow during the day. At night, Great Plains rat snakes come out to hunt. They’re very active during the mating season starting in late June.

Types of Rat Snake

The Great Plains rat snake is in the Colubridae family and in the Pantheropis genus. There are several other types of rat snakes living in North America.
Consider a few examples:

  • Eastern rat snake (Pantherophis alleghaniensis)-It lives on the eastern coast of the United States from Florida running north through New York. They are longer than the Great Plains rat snake growing to a length of six feet.
  • Baird’s rat snake (Pantherophis bairdi)-This snake occupies some of the same territories as the Great Plains rat snake. It lives in Texas as well as in northern and central Mexico. At four and a half feet long, this rat snake is larger in size than the Great Plains rat snake. Plus, this rat snake prefers a rocky habitat.
  • Western rat snake (Pantherophis obsoletus)-The western rat snake shares some territory with the Great Plains rat snake. Its territory runs from Texas north to Minnesota. In terms of color, the western rat snake is all black whereas the Great Plains rat snake is a mixture of gray, tan, dark brown, and black.

Great Plains Rat Snake Scientific Name

Pantherophis emoryi is the Great Plains rat snake’s scientific name. The Greek word Pantherophis translates to panther snake referring to its ability to climb trees. The word emoryi refers to General William Emory, a U.S. surveyor who gathered a specimen of this snake in 1852. It’s also referred to as Emory’s rat snake or the chicken snake.

It is in the Colubridae family and class Reptilia.

Great Plains Rat Snake Population and Conservation Status

The population of the Great Plains rat snake is stable and consists of more than 100,000 adults. It has been placed in the area of Least Concern by the IUCN Red List of Threatened Species.

How to Identify Great Plains Rat Snake: Appearance and Description

This snake is tan or gray with large, dark brown blotches going down its back. All of its blotches are outlined in black. The snake has a spear-shaped brown marking on the top of its head along with a stripe near each eye. Its belly has a black and white pattern and there are stripes on the underside of its tail. It has round pupils. The snake grows to a length of two to three feet but can sometimes reach a length of five feet.

Though the prairie kingsnake is a different type of snake, it shares a similar scale pattern with a Great Plains rat snake. Furthermore, these two snakes live in a lot of the same areas, so it’s possible to mistake one for the other. Fortunately, they are both non-venomous!

A prairie kingsnake is tan or gray in color with dark brown blotches down its back. It also has a marking on the top of its head. But one difference between the two snakes is the blotches on the Great Plains rat snake are thicker and darker than the ones on a prairie kingsnake. Also, the black and white markings on the belly of a Great Plains rat snake are more defined and darker.

The juvenile Great Plains rat snake has a gray body with a pattern of dark splotches on it. It’s easily mistaken for a juvenile black racer snake because of its similar color and pattern. Juvenile black racers start out gray with dark splotches but change to all black as they approach adulthood.

How to identify a Great Plains rat snake:

  • Tan or gray with dark brown splotches outlined in black
  • A spear-shaped marking on its head
  • A stripe across its head and near each eye
  • Black and white patterned belly
  • Stripes on the underside of its tail
  • Round pupils

Great Plains Rat Snake Pictures

Great Plains Rat Snake coils up and shakes its tail in an effort to scare away threats.

Great Plains Rat Snake coils up and shakes its tail in an effort to scare away threats.

Great Plains Rat Snake (Pantherophis emoryi) in Southwestern Missouri. The snake grows to a length of two to three feet but can sometimes reach a length of five feet.

Great Plains Rat Snake (Pantherophis emoryi) in Southwestern Missouri. The snake grows to a length of two to three feet but can sometimes reach a length of five feet.

Great Plains rat snakes are non-venomous with a timid nature.

Great Plains rat snakes are non-venomous with a timid nature.

Great Plains Rat Snake: How Dangerous Are They?

Great Plains rat snakes do not have venom. In addition, they have a timid nature and will try to escape a threatening situation.

Like other types of rat snakes, the Great Plains rat snake has the behavior of vigorously shaking its tail to scare away a predator or a human. Though a rat snake doesn’t have rattles on its tail like a rattlesnake, it can make a similar sound by shaking its tail in a pile of leaves.

A person who is bitten by a non-venomous snake definitely needs care in order for the wound to heal. So, most importantly, wash the injury with warm water and soap. Then, apply first-aid ointment to prevent infection. Next, cover the wound with a clean bandage. Check the wound every few days to ensure it’s healing. If there’s swelling and redness, then visit a doctor to get some further care for the wound.

Just remember: If you see a Great Plains rat snake coiled up and shaking its tail, it’s telling you to move away!

Great Plains Rat Snake Behavior and Humans

The rodents in the diet of this snake make it a familiar sight on farms and ranches in Texas, Colorado, and elsewhere in its region. It helps to keep the rodent population under control.

Unfortunately, the Great Plains rat snake is sometimes called the chicken snake. It has the false reputation of routinely going after chickens on farms. But this non-aggressive snake is mostly interested in capturing and eating rodents.

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Sources

  1. Illinois Department of Natural Resources / Accessed April 26, 2022
  2. Kansas State University / Accessed April 26, 2022
  3. Wikipedia / Accessed April 26, 2022
  4. UF Wildlife / Accessed April 26, 2022
  5. IUCN Redlist / Accessed April 26, 2022
  6. Wikipedia / Accessed April 26, 2022
  7. Lincoln Park Zoo / Accessed April 26, 2022

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Great Plains Rat Snake FAQs (Frequently Asked Questions)

No, these snakes do not have venom.