Arizona's WildLife
"Where the Wild Things Roam"
Mexican Gartersnake
Thamnophis eques
Look along pond and stream edges
The Mexican gartersnake is a slender, semi-aquatic snake native to Arizona, often found near streams, ponds, and other wetland habitats. Recognizable by its distinctive longitudinal stripes and agile swimming ability, this non-venomous snake primarily feeds on amphibians, fish, and small invertebrates. Active during the day, Mexican gartersnakes use both water and surrounding riparian vegetation for hunting and shelter. As an important predator in aquatic ecosystems, they help control amphibian and fish populations while serving as prey for birds, larger snakes, and mammals. Their presence is an indicator of healthy riparian environments and contributes to the overall balance of Arizona’s freshwater habitats.
Reptile
Identification & Behavior
Key Features: Slender, dark body with yellowish stripes
Size: 2–3 ft
Behavior: Active near water; excellent swimmer
Diet: Carnivore — fish, amphibians, insects
Activity Pattern: Diurnal
Habitat & Distribution
Found in southeastern Arizona streams, rivers, and wetlands, particularly along the San Pedro, Gila, and Santa Cruz Rivers. Present in Coronado and Apache-Sitgreaves National Forests.
Elevation Range: 4,000–8,500 ft
Seasonal Presence: Spring–Fall
Risks & Management
Do not handle frequently; delicate species
Fun Fact: Eats small fish and tadpoles to keep populations balanced
