How to Identify the Pacific Gopher Snake (Identification Guide)
The Pacific Gopher Snake is identified by its bold dark blotches on a tan or yellowish background, keeled scales, and habit of mimicking rattlesnake behavior.
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Key identifying features
The Pacific Gopher Snake (Pituophis catenifer catenifer) is a large, powerfully built colubrid recognized by its bold pattern of dark brown or black blotches running down a tan, yellow, or cream background. It is also known for a striking defensive display in which it hisses loudly, flattens its head, and vibrates its tail, sometimes leading to confusion with rattlesnakes despite lacking a rattle.
Coloration & pattern
The back displays large, dark brown to black blotches spaced along a straw-yellow, tan, or light brown background, often becoming more band-like toward the tail. Smaller dark spots may appear along the sides between the main blotches. The belly is typically cream or yellowish, sometimes with dark checkering along the edges.
Head, eyes & scales
The head is moderately narrow and only slightly distinct from the neck, with a somewhat pointed snout adapted for burrowing. Eyes are moderate in size with round pupils. Body scales are strongly keeled, giving the snake a rough, matte texture rather than the smooth, glossy look of some other colubrids.
Size & body shape
This is a large, robust snake, with adults commonly reaching 1.2 to 1.8 meters, occasionally longer. The body is thick and muscular, tapering to a moderately long tail, giving the snake a substantial presence despite being non-venomous.
Range & habitat where you'll see it
The Pacific Gopher Snake is found along the Pacific coast and interior valleys of the western United States, inhabiting grasslands, chaparral, agricultural fields, and open woodlands. It is a strong burrower, often found in rodent burrows, and is active during the day in cooler months and more nocturnal during hot weather.
How to tell it apart from look-alikes
Its bold blotched pattern on a tan background, combined with strongly keeled scales and a pointed snout, helps distinguish it from rattlesnakes, which have a triangular head, heat pits, and a rattle. The Pacific Gopher Snake's round pupils and lack of a rattle, along with its narrower head, are key features separating it from venomous look-alikes despite its rattlesnake-mimicking defensive display.
Frequently asked questions
Why does the Pacific Gopher Snake sometimes get mistaken for a rattlesnake?
It hisses loudly and vibrates its tail as a defensive display, though it lacks a rattle and has round pupils and no heat pits.
What color pattern does this snake have?
Dark brown to black blotches on a tan, yellow, or cream background, often more band-like near the tail.
Are the scales smooth or keeled?
The scales are strongly keeled, giving the snake a rough, matte texture.
Where is the Pacific Gopher Snake found?
Along the Pacific coast and interior valleys of the western United States in grasslands and open habitats.
How large does it get?
Adults commonly reach 1.2 to 1.8 meters in length.
Pacific Gopher Snake identified by the community
Recent Pacific Gopher Snake specimens identified with Snake Identifier.
