: any of a genus (Thamnophis) of harmless viviparous American snakes with longitudinal stripes on the back
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The endangered Chiricahuan leopard frog and the northern Mexican garter snake in Arizona count among those directly threatened by this backyard bully.—Shi En Kim, AZCentral.com, 13 Mar. 2026 Only a few thousand San Francisco garter snakes are estimated to remain in the wild.—Pepper St. Clair, Mercury News, 22 Jan. 2026 While some species hang out solo, others, such as garter snakes, may gather in a communal area, called a hibernaculum.—Arricca Elin Sansone, Southern Living, 19 Jan. 2026 Populations that tend to aggregate in deep, well-insulated dens (like the famous mass overwintering dens of red-sided garter snakes in Manitoba, for instance) reduce exposure to freezing events.—Scott Travers, Forbes.com, 18 Jan. 2026 See All Example Sentences for garter snake