Sinonatrix percarinata suriki

黃頷蛇科，Natricinae 亞種
Colubridae, subfamily Natricinae

100 cm

分布台灣全島海拔500-1000m之間。

台灣特有種。

This snake is small to medium size; total length up to 100 cm. There are 17-19 (19 at mid-body) rows of scales, all strongly keeled except for the outermost row. Head is oval to slightly triangular; body is moderately stout and round; tail is long. Eye is medium to large; iris is yellow, darkened by coarse diffuse black pigment, and pupil is round, slightly off center (toward upper part of eye), black surrounded by ring of dull yellow. Tongue is flesh-colored, darkened by diffuse black pigment. Upper head is uniform dusty gray to olive gray; the labials are slightly lighter than upper head due to light gray mottling. Upper body and tail are gray to dark gray, with irregular cross bands of black or darker gray. Ventral head and neck are dirty white to light cream gray, and the following scales are tinted with gray which progressively more intense posteriorly. Ventral body and tail also bear scattered quadrangular or irregular marks of blackish pigment which are irregularly arranged on sides. Anal scale is divided and subcaudals are paired.

當受到侵擾時，牠會躁動不安，有可能發出攻擊噬咬侵略者，並且會從泄殖腔排出影響嗅覺的警告氣味。

白腹游蛇、華游蛇、烏游蛇。