Snakes
Gray rat snake care guide
Pantherophis spiloides
A large, climbing rat snake of the central/eastern US. Needs height and sturdy branches.
Semi-arboreal — floor space plus climbing
New to reptiles? Check your keeper level first →Gray rat snake enclosure size
Semi-arboreal — floor space plus climbing. An adult gray rat snake should live in at least 48" L × 24" W × 36" H; we build toward 72" L × 24" W × 48" H (6 × 2 × 4 ft, roughly 12 sq ft of floor and about a 359-gallon glass equivalent).
- Hatchling / baby
- 30" L × 12" W × 18" H recommended · min 18" L × 12" W × 12" H
- Juvenile
- 48" L × 18" W × 24" H recommended · min 30" L × 18" W × 24" H
- Adult
- 72" L × 24" W × 48" H recommended · min 48" L × 24" W × 36" H
Temperature and heating
Overhead heat (halogen, deep heat projector or radiant panel) on a thermostat, creating a warm-to-cool gradient.
- Basking / warm surface
- 88–92°F surface
- Warm side (ambient)
- 82–86°F
- Cool side (ambient)
- 72–78°F
- Night
- No lower than 65°F
Lighting and UVB
UVB: Low-level UVB (ShadeDweller / T5 6%) is beneficial but not strictly required. Run lights on a 12 hours on, 12 hours off photoperiod, on a timer, and replace UVB bulbs on the manufacturer's schedule even while they still emit visible light.
Humidity
Target 40–60%. Water bowl and a humid hide.
Substrate and depth
Aspen, cypress mulch or a soil/sand mix. Depth: 3–4 in.
Diet and feeding
Appropriately sized frozen-thawed rodents — every 5–7 days for juveniles, every 10–14 days for adults.
Enclosure tips and furnishing
- Hides on both the warm and cool sides
- Clean water available at all times
- Branches and foliage for climbing and cover
Build list
- Enclosure at adult size — Buy for the adult footprint to avoid repeated upgrades.
- Digital thermostat — Every heat source must run through a thermostat — unregulated heat burns animals.
- Two digital probe thermometers + hygrometer — Read the warm side, cool side and humidity directly.
Gray rat snake FAQ
How big should an adult Gray rat snake enclosure be?
At least 48" L × 24" W × 36" H, and we recommend building to 72" L × 24" W × 48" H — about 6 × 2 × 4 ft, or a 359-gallon glass equivalent. Semi-arboreal — floor space plus climbing.
What temperatures does a Gray rat snake need?
Basking or warm surface 88–92°F surface, warm side 82–86°F, cool side 72–78°F, night No lower than 65°F. Overhead heat (halogen, deep heat projector or radiant panel) on a thermostat, creating a warm-to-cool gradient.
Does a Gray rat snake need UVB?
Low-level UVB (ShadeDweller / T5 6%) is beneficial but not strictly required. Photoperiod: 12 hours on, 12 hours off.
What humidity does a Gray rat snake need?
40–60%. Water bowl and a humid hide.
What substrate is best for a Gray rat snake?
Aspen, cypress mulch or a soil/sand mix, at a depth of 3–4 in.
How big does a Gray rat snake enclosure need to be for a hatchling?
Hatchling / baby: 30" L × 12" W × 18" H recommended, minimum 18" L × 12" W × 12" H. Scale up to the adult footprint as the animal grows.
Sources
Put this guide to work
Apply these targets to your own gray rat snake record, then log feedings, sheds and weights against them.