Western Rat Snake (also known as Black Rat Snake or Texas Rat Snake)
Pantherophis obsoletus • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. obsoletus
Widespread throughout central North America, ranging from the Rocky Mountains in the west to the Mississippi River in the east, and from southern Canada down to the Gulf of Mexico.
Look up Western Rat Snake (also known as Black Rat Snake or Texas Rat Snake) in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Pantherophis, Species: P. obsoletus
Conservation
IUCN Red List: Least Concern. Generally abundant, though they face threats from habitat fragmentation and intentional killing due to being mistaken for other species.
Physical Description
Large, relatively heavy-bodied snake. Juveniles and adults in certain regions exhibit a pattern of dark brown or black blotches on a grey or tan background. In many northern/eastern areas, adults turn almost solid black. Scales are weakly keeled. The head is wider than the neck and eyes have round pupils.
Size & Dimensions
The specimen appears to be a juvenile or sub-adult based on the vivid pattern. Adults typically range from 3 to 6 feet (91–183 cm), with some reaching over 8 feet.
Habitat
Highly adaptable generalists found in hardwood forests, prairies, rocky canyons, and swamps. They are frequently found in agricultural areas and suburban settings, often living in barns or attics. Semi-arboreal by nature.
Diet & Feeding
Active foragers that eat a variety of rodents, birds, and eggs. They are powerful constrictors, killing prey by wrapping their coils around it to stop its heart before swallowing.
Reproduction
Oviparous (egg-laying). Females lay clutches of 10 to 20 eggs in mid-summer, usually in hollow logs, leaf litter, or manure piles. Hatchlings emerge in late summer or autumn.
Conservation Status
IUCN Red List: Least Concern. Generally abundant, though they face threats from habitat fragmentation and intentional killing due to being mistaken for other species.
Cultural Significance
Highly beneficial to farmers and homeowners as a form of natural pest control due to their heavy diet of rodents. They play a critical ecological role in maintaining balanced small mammal populations.
Notable Features
Renowned for their incredible climbing ability; they have evolved specialized belly scales that can grip the bark of a vertical tree trunk. Known for appearing in unexpected high places, such as rafters and tree canopies.