← Herp Calendar map

Snakes

Checkered Garter Snake

Thamnophis marcianus

Across the regions where it's common, the Checkered Garter Snake peaks from May to October.

Shows up in 6 ecoregions and 3 states

Keep Herp Calendar free

Hi, I'm Nick. I built Herp Calendar on my own and I keep it free, with no ads. If it has helped you find a herp this season, a small tip goes straight into the hosting and the data work. Only if you can spare it. Either way, I'm glad you're here.

Leave a tip

Snakes

Checkered Garter Snake

Thamnophis marcianus

Look, don't take. Many states regulate collecting reptiles and amphibians. Photograph it, log it on iNaturalist and leave it where you found it.

Description

The checkered garter snake (Thamnophis marcianus) is a species of garter snake in the subfamily Natricinae of the family Colubridae. The checkered garter snake is typically greenish in color, with a distinct, black checkerboard pattern down its back.Wikipedia ↗

Habitat

The preferred natural habitats of Thamnophis marcianus are desert, grassland, shrubland, and forest, usually close to water, at altitudes from sea level to 2,200 m (7,200 ft). The species is native to the southwestern United States, Mexico, and Central America.Wikipedia ↗

When it's active

They mate from late March through early April. Mating in the north happens in densm where temperatures are warmer; temperatures lower than 10°C can cause them to die or have neurological disorders.Animal Diversity Web ↗
no rights reserved · CC0

When and where it's active

Each row is its own calendar, counted from records in that area. Seasons shift by place.

PeakShoulderQuiet

Ecoregions

States

JanFebMarAprMayJunJulAugSepOctNovDec
ArizonaNew MexicoTexas

About the Checkered Garter Snake

When is the Checkered Garter Snake most active?

Across the regions where it's common, the Checkered Garter Snake peaks from May to October.

Where does the Checkered Garter Snake live?

It has enough records to show in 6 ecoregions and 3 states, including Arizona, New Mexico, and Texas.