Giant Garter Snake vs. Aquatic Garter Snake
The owner's pair: their records touch at the western edge of the Sacramento Valley. A: Narrow, long, pointed; meet the nose scale (rostral) across a narrow join (hand lens) in the Giant Garter Snake; broader, shorter; meet the rostral across a much wider join (hand lens) in the Aquatic Garter Snake. B: 21 or 23 (rarely 19 at the north edge) in the Giant Garter Snake; usually 19 (rarely 21 in the south coast form) in the Aquatic Garter Snake. C: On scale rows 3 and 4 in the Giant Garter Snake; lower, on rows 2 and 3 (or 3 only) in the Aquatic Garter Snake. D: Faint, dull tan or yellow, broken or missing, lost in checkered spots in the Giant Garter Snake; crisp, broad, bright yellow to orange in the Aquatic Garter Snake.
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