Central Ratsnake (formerly Gray Ratsnake)
Pantherophis alleghaniensis • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Found throughout the eastern and central United States, specifically from the Mississippi River to the Appalachian Mountains. Central Alabama, including Birmingham, is well within its core natural range.
Look up Central Ratsnake (formerly Gray Ratsnake) in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. alleghaniensis
Conservation
Least Concern. The species is widespread and adaptable to human-altered landscapes, though they face threats from habitat fragmentation and intentional killing by humans.
Physical Description
Large, powerful snake with a dorsal pattern of dark gray or black blotches on a lighter gray background. The head is wider than the neck, the pupils are round, and the scales are weakly keeled. The body shape is often described as 'loaf-of-bread' shaped in cross-section.
Size & Dimensions
The specimen in the photo appears to be an adult, approximately 4-5 feet (1.2-1.5 meters) long. Adults typically range from 3 to 6 feet, with a record maximum of roughly 8 feet.
Habitat
Generalist species found in forests, agricultural fields, and suburban environments. They are semi-arboreal (climbing experts) and are frequently found on human structures like porches, lofts, and rafters at elevations from sea level to over 600 meters.
Diet & Feeding
Primarily feeds on rodents and birds/eggs. They are active foragers and powerful constrictors, using their strength to subdue prey before consumption.
Reproduction
Oviparous (lays eggs). Females lay clutches of 10 to 30 eggs in mid-summer, usually in hollow logs or mulch piles. Hatchlings emerge in late summer or early fall.
Look-alikes
Commonly confused with the Copperhead (Agkistrodon contortrix), which has hourglass-shaped bands and vertical pupils, or the North American Racer (Coluber constrictor), which is more slender and lacks the distinct blotched pattern as adults. It is also often confused with other ratsnake species (P. spiloides/obsoletus) due to recent taxonomic shifts.
Conservation Status
Least Concern. The species is widespread and adaptable to human-altered landscapes, though they face threats from habitat fragmentation and intentional killing by humans.
Cultural Significance
Highly valued by farmers and homeowners for their role as natural pest control, as they specialize in consuming agricultural pests like rats and mice.
Notable Features
Famous for their physics-defying climbing abilities, often found scaling vertical brick walls or trees by finding minor purchase in the texture. They frequently hold a unique 'crinkled' or S-shaped body posture when motionless.
Notes
On the front porch of someone’s house in Birmingham, Alabama