Eastern Ratsnake
Pantherophis alleghaniensis • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Eastern United States, ranging from the Atlantic coast westward to the Appalachian Mountains and from Florida north to New England. This specimen appears to be in an urban/suburban setting within this range.
Look up Eastern Ratsnake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Conservation
Least Concern (IUCN). Generally common, though vulnerable to habitat fragmentation and intentional killing by humans due to fear.
Physical Description
Black or dark brown dorsal coloration with faint white, yellow, or red outlines of blotches (often visible when the skin is stretched). White or cream-colored chin and throat. Slender but powerful build with weakly keeled scales. Head is distinct from the neck with large eyes and round pupils.
Size & Dimensions
This specimen appears to be an adult approximately 4 to 5 feet in length. Species typically ranges from 3 to 6 feet, with rare records exceeding 7 feet.
Habitat
Extremely versatile; found in hardwood forests, swamps, farmland, and suburban neighborhoods. Highly arboreal and frequently found in rafters, trees, or on brick walls as seen here. Occurs from sea level to high elevations.
Diet & Feeding
Active foragers that primarily consume rodents, birds, and eggs. They are powerful constrictors that often venture into attics or barns in search of prey.
Reproduction
Oviparous (egg-laying). Females lay clutches of 5 to 27 eggs during the summer, which hatch in late summer or early fall. No parental care is provided after laying.
Look-alikes
Commonly confused with the Black Racer (Coluber constrictor), which has smooth scales and a more matte finish, or the Timber Rattlesnake, which is much thicker with a triangular head and rattle.
Conservation Status
Least Concern (IUCN). Generally common, though vulnerable to habitat fragmentation and intentional killing by humans due to fear.
Cultural Significance
Highly valued by farmers and homeowners for natural pest control. This species often features in 'snake in the house' stories due to its incredible climbing ability.
Notable Features
Remarkable climbing ability facilitated by specialized belly scales that can grip rough surfaces like the textured wall in the photo. Often assumes a 'crinkled' or 'S' shape when resting or alert.