How to Identify the Bullsnake (Identification Guide)

Key identifying features

The Bullsnake is identified by its large size, yellow to tan background color patterned with dark brown or black blotches, and a notably pointed, slightly upturned snout used for digging. It is one of the largest colubrid snakes in North America and often produces a loud hissing sound, sometimes vibrating its tail in dry leaves to mimic a rattlesnake, though it has no rattle itself.

Coloration & pattern

The background color is typically straw-yellow, tan, or light brown, overlaid with a series of large, dark brown to black blotches down the back that tend to become more widely spaced and squarish toward the tail. Smaller dark blotches or spots often appear along the sides. The overall pattern is bold and high-contrast, especially in well-marked individuals, though older or worn individuals can appear duller.

Head, eyes & scales

The head is somewhat narrow and elongated with a distinctly pointed, upturned snout tip, an adaptation that aids in burrowing through loose soil. Scales are keeled, giving the body a rougher, less glossy texture than smooth-scaled kingsnakes. Pupils are round, and there is no heat-sensing facial pit, distinguishing it from venomous pit vipers.

Size & body shape

Bullsnakes are among the largest snakes in their range, with adults commonly reaching 4 to 6 feet and occasionally longer. The body is thick and muscular, giving an impression of considerable bulk, and the tail is moderately long, tapering to a point.

Range & habitat where you'll see it

Bullsnakes inhabit open prairies, sandy plains, agricultural fields, and semi-arid grasslands across the central United States, extending into parts of the Great Plains and southwestern states. They are strongly associated with loose, sandy, or well-drained soils suitable for burrowing and are often found in or near rodent burrows, which they may use for shelter.

How to tell it apart from look-alikes

The blotched, yellow-brown pattern combined with keeled scales and a pointed snout separates Bullsnakes from smooth-scaled kingsnakes with similar coloring. Their defensive hissing and tail-vibrating behavior, along with a squarish blotch pattern, can cause confusion with rattlesnakes, but Bullsnakes lack a rattle, a triangular head, and heat-sensing pits. Gopher snakes and pine snakes, close relatives, look very similar and are best distinguished by range and subtle regional pattern differences rather than a single definitive field mark.