Black Rat Snake Care: Complete Keeper's Guide

TL;DR: Black rat snakes (Pantherophis obsoletus) are large North American colubrids reaching 4–6 feet that are semi-arboreal and make excellent pets — they are non-venomous, tame well with regular handling, and eat frozen/thawed rodents readily. Adults need a minimum 4'×2'×2' enclosure with climbing branches and hides at multiple levels, a warm side of 80–85°F, and moderate humidity of 40–60%. Juveniles eat frozen mice every 5–7 days; adults eat every 10–14 days and can graduate to small-medium frozen rats.

The black rat snake (Pantherophis obsoletus) is one of North America's most common and largest native snakes, reaching 4-6 feet as adults. In the wild, they're exceptional climbers and rodent hunters found from New England to the Great Plains. In captivity, they make excellent pets -- hardy, feeding well on readily available frozen prey, and generally docile with regular handling.

They are sometimes called Eastern rat snakes and are closely related to corn snakes, though they grow significantly larger.

Quick Facts: Black Rat Snake

Enclosure

Black rat snakes grow large and need substantial floor space. They are also semi-arboreal and will use height:

• Adults: 4' x 2' x 2' minimum; 48-gallon or larger enclosure
• Provide climbing branches and hides at multiple levels

Temperature

• Warm side ambient: 80-85 degrees F
• Basking spot: 85-88 degrees F
• Cool side: 70-75 degrees F
• Night: 65-70 degrees F

Use an under-tank heat mat with thermostat or a low-wattage overhead basking lamp.

Humidity

Target 40-60% humidity. Use a digital hygrometer. Provide a humid hide with damp sphagnum moss during shed cycles.

Substrate

• Aspen shavings -- dry, inexpensive, excellent
• Coco fiber + topsoil mix -- retains more humidity
• Cypress mulch -- good for naturalistic setups

2-3 inches deep. Black rat snakes don't burrow heavily but appreciate some depth.

Feeding

Frozen/thawed rodents exclusively:

• Juveniles: Fuzzy to adult mice
• Adults: Small to medium rats or large mice
• Frequency: Juveniles every 5-7 days; adults every 10-14 days

Use feeding tongs. Frozen/thawed feeder rats are the safest option.

Handling

Wild black rat snakes are often defensive, but captive-bred individuals tame quickly with regular handling. They may musk when first picked up but become calm with consistent interaction.

See our reptile handling guide for taming techniques.

Common Health Issues

• Respiratory infections: From cold or damp conditions
• Retained shed: From low humidity; provide humid hide and warm soak
• Mites: Visible in water dish and under scales; treat promptly

Avoid common mistakes in our lizard owner mistakes guide.