Colorado Snakes: A Comprehensive List

The serene landscapes of Colorado aren't just inhabited by its iconic wildlife; they also host a fascinating array of reptilian species, including several serpents that call this state home. With diverse habitats ranging from deserts to forests, and mountains to plains, Colorado provides ample niches for various snake species to thrive. Let's delve into the world of Colorado snakes, discovering the fascinating facts about these often-misunderstood creatures.

Colorado's snake biodiversity is impressive, boasting 27 recognized species, although not all are native, with some having been introduced or occasionally wandering in from neighboring states. Before we explore these slithering denizens, it's crucial to understand that, like much of the wildlife in Colorado, snakes play a vital role in maintaining ecosystem balance, making them worthy of our respect and conservation efforts.

Native Colorado Snakes

Roughly two-thirds of Colorado's snake species are native, each with unique adaptations and roles in their respective ecosystems. Here, we'll discuss two notable native species, the Western Hognose Snake and the Great Basin Garter Snake.

Western Hognose Snake (Heterodon nasicus)

The Western Hognose Snake is a unique and intriguing species, easily identified by its stout body, upturned snout, and distinctive vertical pupils. Growing up to 30 inches, these non-venomous snakes possess a remarkably versatile diet, feeding on a range of prey, from rodents and birds to other snakes. Their unique hunting behavior, which includes "playing dead" when threatened, has made the Western Hognose Snake a subject of fascination for reptile enthusiasts worldwide.

Throning these fascinating creatures further, the Western Hognose Snake's defensive strategy also includes hooding, where the snake inflates its body and hisses menacingly - a display that, while intimidating, is ultimately harmless to humans. These snakes favor open grasslands and prairies, with Colorado's expansive eastern plains providing ample habitat for these remarkable serpents.

Great Basin Garter Snake (Thamnophis brachydactylus)

Sleek and slender, the Great Basin Garter Snake is a member of one of the most diverse and widespread genus of snake native to North America. Reaching lengths of up to 26 inches, these snakes vary in color from olive to gray or brown, often with distinct longitudinal stripes. Unlike many other garter snakes, the Great Basin variety is entirely aquatic, with habitats concentrated around rivers, wetlands, and pond margins.

One captivating aspect of the Great Basin Garter Snake's behavior is its tendency to bask communally, with multiple individuals often sharing sunning sites. Additionally, these snakes are one of the few North American species capable of delivering venom powerful enough to immobilize small mammals and birds - an adaptation they've evolved in response to their predominantly aquatic lifestyle. Keep in mind, however, that the Great Basin Garter Snake's venom is not potent enough to pose a significant threat to humans.

Colorado's Invasive Snake Species

Unfortunately, not all snakes dwelling in Colorado are native. Two introduced species, the Western Hopi Snake and the Bullsnake, have successfully established populations within the state, with varying degrees of ecological impact.

Western Hognose Snake (Heterodon nasicus)

The Western Hopi Snake is an exotic-looking, stocky snake known for its venomous bite. Originally native to the cruel deserts in the Southwestern United States and Mexico, this snake has a highly variable color pattern, ranging from light gray to almost black, and has developed a fearsome reputation due to its aggressive, pit viper-like behavior. Despite its fearsome appearance and het