Hypsiscopus plumbea

黃頜蛇科，水蛇亞科
Colubridae, subfamily Homalopsinae

72 cm

台灣全島海拔500公尺以下低海拔區域，瀕危。 線上分佈地圖

南中國(淮南，安徽，福建，廣東，廣西，湖南，湖北，江蘇，江蘇，浙江），台灣，北越南。

Small snake; total length up to 72 cm. There are 15-19 (19 at mid-body) rows of smooth and glossy scales. Head is broad oval; body is short and stout, somewhat flattened; tail is short. Both nostrils (with a lid each) and eyes face upward. Eye is small, beady, and bulging; iris is red brown to dark brown and pupil is black and inconspicuous. Tongue is red, tinged with black, and fork tips are dark gray to black. The nasals are not separated; there is only one internasal. Upper head is uniform olive to dark olive green and the edge of mouth is dirty white or cream, with a distinct line of demarcation from upper head, extending from nose to corner of mouth and posteriorly along neck. Upper body and tail is uniform gray olive to dark olive green; the first to third scale rows are dirty white to dirty yellow and may be very lightly tinged with salmon. Ventral head is white to cream, usually possesses gray to dark gray margins. Ventral body is gray white to light dirty yellow, occasionally with horizontal lines of gray or diffuse black and a median series of dark spots; there may be a dark mid-ventral line at junction of subcaudals. Anal scale is divided and subcaudals are paired.

這是一個有著後溝牙(詳見附註 (1))的物種，並且有著輕微的毒性。牠的毒性對人類並不致命，但會有疼痛、麻癢、腫脹或是可能引發過敏的反應等。

plumbea 是指"鉛色"在此形容牠的顏色。 鉛色水蛇、水蛇、水泡蛇。

本種類似 M. chinensis(唐水蛇)，但是唐水蛇背面有交雜著一些黑色斑點。