Corn Snake

Overview

Corn snakes (red rat snakes) are docile, non-venomous and come in many colors and patterns, which makes them one of the most popular pet snakes ¹³. Adults are 2.5 to 5 feet long ³, and they can live 15 to 20 years or more ¹². They are relatively hardy ³.

Natural history

Wild corn snakes live in the forests, woodland edges, prairies and farmland of the southeastern and central United States ¹²³. They eat small mammals, birds and eggs ³. The name is said to come from their resemblance to maize ². When startled, they may vibrate the tail like a rattlesnake ². Wild corns hibernate in winter, but pet corns don't need to unless you plan to breed them ²³.

Enclosure

• Size. At least a 30-gallon terrarium for an adult ¹³. Hatchlings can start in a 10-gallon enclosure ².
• Escape-proof lid. Corn snakes are escape artists. Use secure doors and a locking lid ¹.
• Climbing. They climb readily, so add branches and some vertical space ¹³.
• Hides. Two snug hides, warm and cool, no more than about 50% bigger than the snake. Add a humid hide with damp sphagnum moss ¹.
• Water. A shallow bowl large enough to soak in, heavy enough not to tip. Change it daily ¹³.

Corn snakes can be housed in pairs or trios year-round ³, though one snake per enclosure is simplest.

Temperature & lighting

Use an under-tank mat, radiant panel or heat lamp, always on a thermostat, and check it with a digital thermometer. Never use hot rocks ¹.

UVB. Research shows corn snakes can use UVB to make vitamin D, so Tree of Life now recommends a 5% UVB light for 10 to 12 hours a day ¹.

Humidity

Aim for 35 to 60%, toward the high end while the snake is shedding ¹². A big water bowl and a humid hide usually keep it in range ¹².

Substrate

Aspen or cypress mulch let corns burrow and hold some humidity ¹². Newspaper or paper towel are good for hatchlings and new arrivals, so you can watch their droppings ². Avoid pine and cedar, which irritate the airways ¹². Avoid sand, corncob and soil, which can cause impactions if swallowed ¹.

Diet & supplementation

• Prey. Frozen-thawed mice, starting with pinkies and stepping up to adult mice. Prey should be no wider than the snake's head ¹².
• How often. Tree of Life suggests feeding juveniles twice a week and adults every 7 to 10 days ¹. Chicago Exotics suggests every 5 to 7 days for hatchlings and every 10 to 14 days for adults ².
• Pre-killed only. Live prey can badly injure a snake ¹².

Handling & temperament

Corn snakes are relatively docile and rarely bite ³. Wash your hands before handling so you don't smell like food. Support the body along its length rather than letting it hang from the head and neck ³. Afterwards wash again: corn snakes and feeder mice can carry Salmonella ⁶.

Health

Common issues

• Respiratory infections, often linked to low temperatures or dirty enclosures ⁴.
• Snake mites, tiny black mites that spread between enclosures ⁵.
• Stuck shed and retained eye caps ².
• Blister disease (pustular dermatitis) ³.
• Egg binding in females, and infected or impacted hemipenes in males ².

When to see a vet

Have a new corn snake checked by a reptile vet, including a fecal test for parasites, and plan for an annual exam ². Call your vet if your snake refuses two or more feedings in a row, doesn't pass stool within 7 to 10 days of eating, sheds badly, or has diarrhea, discharge from the eyes, nose or mouth, or lethargy ². Open-mouth breathing or an unresponsive snake is an emergency ⁷.

Breeding overview

Corn snakes are mostly captive-bred ³. Breeding requires a winter cool-down (brumation) for healthy adults only ³. Females lay eggs about two months after mating, with clutches of 8 to 20 eggs (10 to 12 on average). Hatchlings are about 8 inches long ². Sexing is usually done by probing, which should be left to an experienced keeper or vet ³.

Genetics & morphs

Albinos and many other color morphs are bred in captivity ³. Amelanistic, snow and Okeetee are among the most common ².

Legal & ethics

Most pet corn snakes are captive-bred ³. Buy captive-bred, and never release a pet snake outdoors.

Sources

1. Corn Snake Care · Tree of Life Exotic Pet Medical Center
2. Cornsnake Care · Chicago Exotics Animal Hospital
3. Basic Information Sheet: Corn Snake · LafeberVet
4. Respiratory Infections in Snakes · Tree of Life Exotic Pet Medical Center
5. Mites in Reptiles · Tree of Life Exotic Pet Medical Center
6. Salmonella, Feeder Rodents, and Pet Reptiles and Amphibians · U.S. Food and Drug Administration
7. When Should My Reptile See a Veterinarian? · Tree of Life Exotic Pet Medical Center

Last reviewed 2026-10-24 by Novel Fauna. This guide is general husbandry information, not veterinary advice. When an animal is sick, see a veterinarian experienced with exotic animals.

Revision history

1. 2026-10-24 Library: 50 cited care guides, /library/[slug] route, coming-soon cards, SLUGS.txt synced to species.guide_slug 228ce54

Evidence grades: Novel Fauna editorial: source classification, not yet expert-reviewed, 2026-10-25. What the grades mean.

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