Photos by Chris Brown

Scientific name: Thamnophis hammondii

Common name: Two-Striped Garter Snake

Size: 15.4-28.4 in (39-72 cm)

Distinguishing characters: A species that lacks a mid-dorsal stripe; olive, brown or brownish-grey dorsum; dull yellow, orange, or salmon venter; lengthwise rows of small, dark spots; yellow stripes on sides; throat pale; eyes brick color with round pupils; red tongue; dorsal scales keeled; usually black patches on neck behind head; occasional melanic individuals lacking side stripes.

Juveniles: Similar to adults.

Dimorphism: Female has extremely constricted tail immediately posterior of the base.

Similar species: Masticophis lateralis: Has smooth scales; black tongue.

Additional notes: This species excretes foul smelling musk when handled.

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fieldguide/thha.htm
Last update: 05 March 2003