Eastern Rat Snake
Pantherophis alleghaniensis
A large, glossy black constrictor common across the eastern U.S., often seen climbing trees or barn rafters in search of rodents and birds.
- Venomous?
- Non-venomous
- Adult length
- 1.2-1.8 m (4-6 ft)
- Range
- Eastern United States from the Atlantic coast to the Appalachians
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Overview
The eastern rat snake is one of the largest and most commonly encountered snakes in the eastern United States. Adults are typically uniform black, though juveniles show a strongly blotched pattern that fades with age.
An excellent climber, it is often found ascending trees, barns, and stone walls in pursuit of prey or basking sites, making it a familiar sight to rural residents.
How to identify it
- Adults mostly shiny black, sometimes with faint remnants of blotching
- White or cream coloring on the chin and throat
- Juveniles strongly patterned with dark blotches on a gray background
- Weakly keeled scales; slightly flattened body shape (loaf-shaped in cross-section)
- Round pupils, no heat-sensing pits
Habitat & range
Found in forests, farmland, rocky hillsides, and suburban areas throughout its eastern range. Frequently uses tree cavities, barns, and abandoned buildings as shelter.
Behavior, diet & reproduction
Primarily diurnal, an agile climber that hunts rodents, birds, and eggs by constriction. Breeds in spring, laying eggs in rotting logs, compost, or leaf litter in early summer.
Frequently asked questions
Is the eastern rat snake venomous?
No, it is nonvenomous and kills prey by constriction.
Why do juveniles look so different from adults?
Young eastern rat snakes have a blotched gray pattern that gradually darkens to solid black as they mature.
Is it a good climber?
Yes, it is highly arboreal and often found in trees, barns, and building eaves.
Eastern Rat Snake guides
In-depth guides for identifying and understanding Eastern Rat Snake.
Eastern Rat Snake identified by the community
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