Butler's Garter Snake
Thamnophis butleri
A dark colored Colubrid with three distinct light stripes running the length of its body; one centered dorsally and the other two located laterally. The lateral stripes a…
How to identify
A dark colored Colubrid with three distinct light stripes running the length of its body; one centered dorsally and the other two located laterally. The lateral stripes are uniquely placed three scale rows dorsally from the ventral scales, and partially including the second and fourth scale rows. It grows to a length of 15-20 inches and has a somewhat small head compared to other garter snakes. Rather than escaping, this species is known to violently squirm in place when threatened.
Range
Extends from western Ohio into eastern Indiana, northwards into eastern Michigan and slightly across the Canadian border into southeastern Ontario. An isolated population can also be found in southeastern Wisconsin.
Habitat
This species prefers open grassy or slightly wooded habitats with ample moisture. It can be located in suburban areas, such as overgrown vacant lots and backyard gardens. Likes hiding under natural or man-made debris, such as wood piles. Known for communal hibernation with the same species or with the common garter snake.
Variations
Primary coloration ranges from dark olive green to black. Stripes range from light yellow to orange. Some individuals may display dark spots arranged in two rows between the lateral and dorsal stripes.
Similar species
The more widely-ranging common garter snake (Thamnophis sirtalis) has similar morphology, but is much longer and does not have the three distinct stripes like the Butler’s garter snake. Its pattern and coloration are more variable.
Name and etymology
Butleri: Honors Amos W. Butler.
At a glance
Size
38 to 73.7 cm
Range
Extends from western Ohio into eastern Indiana, northwards into eastern Michigan and slightly across the Canadian border into…
Habitat
This species prefers open grassy or slightly wooded habitats with ample moisture. It can be located in suburban areas, such a…
Range map
Approximate range. © Mapbox © OpenStreetMap