Eastern Ratsnake
Pantherophis alleghaniensis • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Eastern United States, from the Atlantic coast to the Appalachian Mountains and from Florida to New England and southeastern Canada.
Look up Eastern Ratsnake in the Snake Encyclopedia →Venomous Status
Non-venomous (aglyphous)
Danger Level
Harmless. They are non-aggressive, though they may bite if handled roughly. Bites cause minor scratches and do not require antivenom.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Conservation
IUCN status: Least Concern. Generally common, but threatened by habitat fragmentation and misplaced fear by humans.
Physical Description
Adults are typically solid black or dark grey with weakly keeled scales. The belly is usually white or checkered with black and white. Their heads are distinct from the neck with large eyes and round pupils. Juveniles have gray blotches on a lighter background.
Size & Dimensions
Typical adult size is 3 to 6 feet (91-183 cm), with maximum records exceeding 8 feet (250 cm). This specimen appears to be an adult of moderate size.
Habitat
Highly adaptable; found in hardwood forests, swamps, farmland, and suburban areas. Primarily arboreal but frequently found in barns and abandoned buildings at varied elevations.
Behavior & Temperament
Diurnal and crepuscular; active hunters known for being excellent climbers. When threatened, they may freeze, vibrate their tail to mimic a rattlesnake, or release a foul-smelling musk. Generally docile.
Diet & Feeding
Active forager and powerful constrictor. Diet consists primarily of rodents, birds, and bird eggs. Found frequently in rafters hunting for nests.
Reproduction
Oviparous (egg-laying). Females lay clutches of 5 to 27 eggs during the summer months, which hatch in late summer or early fall.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
Often confused with the Black Racer (Coluber constrictor), which has smooth scales and a white chin, or the venomous Cottonmouth (Agkistrodon piscivorus), which has a thicker body and heat-sensing pits.
Conservation Status
IUCN status: Least Concern. Generally common, but threatened by habitat fragmentation and misplaced fear by humans.
Cultural Significance
Highly valued by farmers for effective rodent control. Often featured in North American folklore as the 'Barn Snake' or 'Pilot Snake' due to the myth that they lead rattlesnakes to denning sites.
Notable Features
Renowned for their exceptional climbing ability; they use their belly scales to grip bark and can scale vertical tree trunks or brick walls.