page_title: Aquatic garter snake
section_title: Subspecies
hierarchical_section_title: Aquatic garter snake / Subspecies
caption_attribution_description: English: The Santa Cruz Garter Snake, Thamnophis atratus atratus. Taken on the campus of the University of California, Santa Cruz, USA.
context_page_description: The aquatic garter snake is a species of colubrid snake. Three subspecies are currently recognized.
context_section_description: Santa Cruz garter snake, T. a. atratus (Kennicott, 1860)
  Oregon garter snake, T. a. hydrophilus  Fitch, 1936
  Diablo Range garter snake, T. a. zaxanthus Boundy, 1999
caption: Thamnophis atratus atratus, the Santa Cruz garter snake
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