Central Ratsnake (Grey Ratsnake)
Pantherophis alleghaniensis • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Common across North America, ranging from the East Coast of the US to the Midwest, including states like Ohio, Kentucky, Tennessee, and Alabama up through Southern Ontario, Canada.
Look up Central Ratsnake (Grey Ratsnake) in the Snake Encyclopedia →Venomous Status
Non-venomous
Danger Level
Harmless / Low Risk. They are not dangerous to humans or pets. While they can bite if cornered or handled, bites typically result in minor scratches and no long-term damage.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Conservation
IUCN Least Concern. Populations are generally stable, though they face threats from habitat fragmentation and intentional killing due to being mistaken for venomous snakes.
Physical Description
Large, elongated snake with a black or dark grey dorsal color. This specimen shows 'crinkled' skin and faint reddish-brown blotches visible between the scales. The head is slightly wider than the neck, with large round pupils and weakly keeled scales on the back.
Size & Dimensions
The specimen appears to be an adult approximately 1.2 to 1.5 meters (4-5 feet) long. The species typically ranges from 1 to 1.8 meters, with records exceeding 2.5 meters.
Habitat
Generalist species found in forests, woodlots, rocky hillsides, and farm fields. They are highly adaptable to human-altered environments like barns and suburban gardens. Found from sea level up to roughly 1,300 meters.
Behavior & Temperament
Diurnal in spring/fall and nocturnal in hot summer. When threatened, they often 'kink' their bodies to break up their silhouette or vibrate their tails in dry leaves to mimic a rattlesnake. They are excellent climbers (arboreal).
Diet & Feeding
Primarily rodents, birds, and eggs. They are active foragers and powerful constrictors, often climbing trees to raid bird nests or entering buildings to find mice.
Reproduction
Oviparous (egg-laying). Females lay clutches of 10 to 30 eggs in mid-summer in decaying logs or leaf litter. Hatchlings emerge in late summer or early fall.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
North American Racer (Coluber constrictor) which has smooth scales and is more slender; and various rattlesnakes (Crotalus sp.), though ratsnakes lack a rattle and have round pupils.
Conservation Status
IUCN Least Concern. Populations are generally stable, though they face threats from habitat fragmentation and intentional killing due to being mistaken for venomous snakes.
Cultural Significance
Highly valued by farmers for rodent control, earning them the nickname 'Barn Snake.' They play a vital ecological role in controlling the spread of Lyme disease by predating on mice.
Notable Features
Noted for their 'crinkling' behavior where the body assumes a zig-zag appearance. They are one of the most proficient climbing snakes in North America, often found in rafters or high tree branches.