How to Identify the Eastern Fox Snake (Identification Guide)
The Eastern Fox Snake is a large, blotched constrictor of the Great Lakes region, identified by its tan to yellowish body and reddish-brown head that can be mistaken for a venomous species.
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Key identifying features
The Eastern Fox Snake is a stout, medium to large snake, generally 3 to 5.5 feet long, patterned with a row of dark brown to black blotches on a yellowish-tan to grayish-brown background. Like its western counterpart, it develops a reddish-orange head as it matures, which is a useful field mark.
Coloration & pattern
The back carries large, evenly spaced dark blotches bordered in black, with a secondary row of smaller blotches along each side. Ground color is generally a warm tan to pale brown, sometimes with a slightly grayish cast. The head reddens with age, often becoming a rich rust or copper color by adulthood, contrasting with the more muted body tones.
Head, eyes & scales
The head is moderately broad, not sharply distinct from the neck, with large round pupils. Body scales are keeled, producing a slightly rough surface texture. The reddish head color, combined with the blotched pattern, is the source of frequent confusion with copperheads among people encountering this harmless species.
Size & body shape
This species has a thick, muscular body typical of a strong constrictor, and it can release a musky odor when disturbed, a defensive behavior shared with the western fox snake. Juveniles are grayer with less vivid head coloration, developing the characteristic reddish head as they age.
Range & habitat where you'll see it
The Eastern Fox Snake occurs around the Great Lakes region, particularly in Michigan, Ohio, and southern Ontario, favoring marshes, lakeshore dunes, wet meadows, and agricultural edges. It is often found near water and is a capable swimmer.
How to tell it apart from look-alikes
Its blotched body and reddish head are sometimes mistaken for a copperhead, but it lacks the copperhead's hourglass-shaped bands, heat-sensing pits, and vertically elliptical pupils, having round pupils instead. It is distinguished from the Western Fox Snake mainly by geographic range, as the two occupy separate areas on either side of Lake Michigan with essentially no overlap. Compared to milk snakes, which have more contrasting, brighter blotches and a smaller overall size, the Eastern Fox Snake is considerably larger and heavier-bodied.
Frequently asked questions
How can I tell an Eastern Fox Snake from a copperhead?
Eastern Fox Snakes have round pupils, no heat-sensing facial pits, and blotches rather than hourglass-shaped crossbands, unlike copperheads.
Where is the Eastern Fox Snake found?
It occurs around the Great Lakes, especially in Michigan, Ohio, and southern Ontario, near marshes and lakeshores.
What does the Eastern Fox Snake's head look like?
Adults typically develop a reddish-orange to rust-colored head, more vivid than the tan or brown body.
Is the Eastern Fox Snake dangerous?
No, it is nonvenomous, though it may hiss, vibrate its tail, and release a musky odor when threatened.
Eastern Fox Snake identified by the community
Recent Eastern Fox Snake specimens identified with Snake Identifier.
