LOCUS.Scales
Species care guide
Gray rat snake
Quick sourced reference values. LOCUS Scales' full breeding/genetics toolset is built specifically for ball pythons — this page is a courtesy reference for other species.
Scientific name
Pantherophis spiloides
Native range
Central and southeastern United States; small isolated populations in Ontario (Canada)
Lifespan
~15 years on average in captivity, over 20 years possible
Lifestyle
🌍🌳 Semi-arboreal (excellent climber)
Adult: 1.1-1.8 m (42-72 in), males grow faster and larger. Gradient of 22-28°C (72-82°F), moderate humidity (30-70%, aim for the middle): too dry = bad sheds, too wet = scale rot. A climber: provide a sturdy branch and a well-locked lid. ⚠️ In Canada, the species is at risk (threatened or endangered in Ontario, Species at Risk Act): never take an animal from the wild and check local regulations.
Diet: Carnivore — appropriately sized mice and rats, frozen-thawed. Also eats birds and eggs in the wild. Some babies refuse pinkies at first: scenting the pinky with a small lizard or tree frog often helps.
Feeding frequency: Every 5-10 days, more often for young snakes.
Substrate: Newspaper (easiest to clean), aspen shavings or coconut coir. Keep a dry spot. Never pine or cedar — toxic oils.
UVB: Not documented as essential in the sources consulted.
🏠 Enclosure size
Baby : Shoebox-sized tub, upsized as it grows
Sub-adult : Upsize gradually with size
Adult : 30×12×12in (20-gallon long) minimum for a single adult — bigger is better, with a branch
Common questions
People say rat snakes are aggressive, is that true?
They have that reputation, especially wild-caught animals, which may bite or musk at first. With calm, regular handling, they usually settle quickly. A snake hook helps the first few times.
My baby refuses pinkies, what do I do?
It's common: in the wild, the young mostly eat lizards and small frogs. Scenting the pinky with a small lizard or tree frog often helps with the switch.
It rubs its nose on the walls, is that serious?
It can become serious: rubbing the snout (rostrum) causes wounds that get infected. It's often a sign of a restless snake or an enclosure that is too small. Offer more space and hides, and avoid rough surfaces.
Can I keep several together?
One animal per enclosure is best. Two males can fight seriously during breeding season.