Overview
The Western Foxsnake (Pantherophis ramspotti) is a handsome, beneficial prairie constrictor native to the upper Midwestern plains of the United States. Named for the pungent, musky odor reminiscent of a red fox that it secretes when handled, this docile rodent hunter is an indispensable ally to Midwestern farmers, keeping agricultural fields and grain silos free of destructive mice and rats.
Biology and Physical Characteristics
Pantherophis ramspotti has a robust, muscular body colored golden-tan, light bronze, or buff, boldly patterned with 35 to 45 dark chocolate-brown or black dorsal blotches. Its head is typically a distinctive warm coppery-orange, which unfortunately leads to frequent mistaken identity by humans who confuse it with the venomous copperhead (which does not occur in its northern prairie range).
Behavior and Ecology
When alarmed or cornered, the Western Foxsnake performs a convincing rattlesnake mimicry: it coils defensively, expands its head into a triangular shape, and rapidly vibrates its tail against dry prairie leaves or grass, producing a buzzing rattle that sounds remarkably like a real rattlesnake. An adept climber and swimmer, it enters barns, rodent burrows, and rock piles in search of voles and mice.
Conservation and Human Impact
Assessed as Least Concern by the IUCN, the Western Foxsnake is locally common across Iowa and southern Minnesota. However, it suffers heavy mortality from vehicle strikes on Midwestern highways and intentional killing by people who misidentify its coppery head and tail-vibrating defense as a venomous species.
Interesting Factoid
When threatened, the harmless Western Foxsnake vibrates its tail rapidly against dry prairie leaves, producing a loud buzzing rattle that sounds so much like a rattlesnake that even experienced hikers are fooled.