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
Venomous Status
Non-venomous (aglyphous dental arrangement)
Danger Level
Harmless; they generally pose no threat to humans or pets but may bite if handled roughly or cornered.
Geographic Range
Commonly found in North America throughout the central United States, from the Mississippi River west to the Rocky Mountains, and from southern Canada down to the Gulf of Mexico.
Conservation Status
Least Concern (IUCN). Population is stable, though they are frequently killed by humans due to mistaken identity as venomous snakes.
Physical Description
The specimen shows a dark, dorsal coloration with faint evidence of a blotched pattern, common in adults of this species. The head is distinct from the neck with large eyes and round pupils. Scales are weakly keeled, and the body has a characteristic 'loaf of bread' shape in cross-section.
Size & Dimensions
Based on the image, this appears to be a smaller adult or sub-adult, roughly 3 to 4 feet in length. The species typically ranges from 3.5 to 6 feet, with record lengths exceeding 8 feet.
Habitat
Highly adaptable habitat generalists found in hardwood forests, prairies, rocky canyons, and often near human dwellings (barns and attics). They are excellent climbers (arboreal) and spend much time in trees.
Behavior & Temperament
Known for being quite docile but can be defensive when startled, often performing a 'kinked' posture or vibrating the tail to mimic a rattlesnake. They are primarily diurnal or crepuscular depending on temperature.
Diet & Feeding
Active foragers and powerful constrictors. They primarily consume rodents, birds, and bird eggs. They are highly valued as natural pest control due to their preference for mice and rats.
Reproduction
Oviparous (egg-laying). Females lay clutches of 10 to 30 eggs in mid-summer, which hatch in late summer or early fall. No parental care is provided after hatching.
Venom Profile
Venom Type
Non-venomous - no medically significant venom.
AI-generated — see a qualified source if acting on this. For any snakebite, call emergency services immediately.
Look-alikes
Often confused with the North American Racer (Coluber constrictor), which has smooth scales, or various species of Rattlesnakes (Crotalus spp.) when it vibrates its tail. Juveniles are confused with Copperheads due to their blotched pattern.
Conservation Status
Least Concern (IUCN). Population is stable, though they are frequently killed by humans due to mistaken identity as venomous snakes.
Cultural Significance
Commonly nicknamed the 'Farmer's Friend' for its ability to clear barns of rodents. Frequently featured in North American folklore regarding its climbing abilities and 'cracking' its tail.
Notable Features
Excellent climbers with a unique squared-off belly scale shape that allows them to scale vertical surfaces like tree trunks or brick walls.