Central Ratsnake (also known as the Black Ratsnake)
Pantherophis alleghaniensis (formerly P. spiloides) • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Eastern North America, ranging from the East Coast of the United States to the Mississippi River, and from southern Ontario, Canada, down to the Gulf Coast.
Look up Central Ratsnake (also known as the Black Ratsnake) in the Snake Encyclopedia →Venomous Status
Non-venomous (Agliphouse teeth - no fangs)
Danger Level
Harmless. These snakes are non-aggressive toward humans and generally flee when approached. Bites may occur if the snake is handled or restrained, but they cause only minor mechanical trauma.
Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Conservation
Least Concern (IUCN). However, they are threatened by habitat loss, road mortality, and intentional killing due to being mistaken for venomous snakes.
Physical Description
Large, solid black body with weakly keeled scales. The throat and chin are white or cream-colored, often with some dark mottling. The head is wider than the neck, and the eyes have round pupils.
Size & Dimensions
The specimen in the photo appears to be a large adult, likely 4-5 feet long. The species typically ranges from 3 to 6 feet, with record lengths reaching up to 8 feet.
Habitat
Highly adaptable. Found in hardwood forests, swampy bottomlands, farmland, and rocky hillsides. They are semi-arboreal and frequently found in suburban areas, often in attics or barns.
Behavior & Temperament
Diurnal during spring and fall, becoming crepuscular or nocturnal in summer. They are excellent climbers. When threatened, they may freeze, 'kink' their body into a series of jagged coils, or vibrate their tail in leaf litter to mimic a rattlesnake.
Diet & Feeding
Active foragers that primarily consume rodents (rats, mice), birds, and eggs. They kill their prey via constriction and play a vital role in controlling agricultural pests.
Reproduction
Oviparous (egg-laying). Females lay clutches of 10-30 eggs during mid-summer, which hatch in late summer or early autumn. Hatchlings have a distinct blotched pattern that fades to black as they age.
Venom Profile
Non-venomous - no medically significant venom.
Look-alikes
Commonly confused with the Northern Black Racer (Coluber constrictor), which has smooth scales and a more slender body. Juveniles are often mistaken for Timber Rattlesnakes or Copperheads due to their blotched pattern.
Conservation Status
Least Concern (IUCN). However, they are threatened by habitat loss, road mortality, and intentional killing due to being mistaken for venomous snakes.
Cultural Significance
Highly valued by farmers for intensive rodent control. They are one of the most common large snakes encountered by humans in the Eastern US and are staples of North American herpetological education.
Notable Features
Noted for their 'loaf of bread' body shape (flat on the bottom) which aids in climbing vertical surfaces like tree bark or stone walls. They frequently utilize the 'kinked' posture seen in this photo as a form of camouflage.