红纹滞卵蛇Oocatochus rufodorsatus
地方名：水蛇、三线蛇、黄领蛇
曾用名：红点锦蛇
形态特征：成体全长600～1000mm。体型细长，瞳孔圆形。头体背淡红褐色或黄褐色，头背有3道黑褐色“∧”形斑。体背前段有4行黑点，逐渐连成4条黑纵线达尾部，4条黑线之间为3条浅色纹，正中的一条呈红褐色，两侧两条为灰褐色。腹面黄棕色，密缀不规则的黑色小方块。上唇鳞多为7枚，呈2-2-3式。下唇鳞9～11枚。背鳞平滑，多21-21-19行。腹鳞163～184枚，尾下鳞32～64对，肛鳞二分。
生活习性：半水生性，生活在靠近水域的草丛中，稻田里，亦见于田野、坟堆、潮湿的丘陵地区碎石堆中。善游泳、喜钻洞，多以蛙类、鱼类为食。春秋两季交配，卵胎生，8—9月产仔，每产10条左右。
地理分布：国内分布极为广泛，且受人为放生影响，除甘肃、宁夏、青海、新疆、西藏等省区未见报道外，其余各地区皆有分布；国外分布于俄罗斯西伯利亚东部、朝鲜和日本北部。
环渤海地区分布：均有分布。
生存现状：无危（LC）。
Squamata Colubridae Oocatochus
53.Oocatochus rufodorsatus
Description Adults up to 600-1,000mm.Slender body; pupils are round; head dorsum is light reddish brown or yellowish brown; three dark brown spots in“∧”shape on the head dorsum; four rows of black dots in the front body, gradually connecting into four vertical lines to the tail; three light colored stripes between the four black lines, one in the middle is reddish brown, two stripes on the sides are greyish brown; ventral is yellowish brown with irregular black squares; 7 supralabials are arranged in 2-2-3 rows and 9-11 infralabials.Dorsal scales are smooth and arranged in 21-21-19 rows; 163-184 ventral scales; 32-64 pairs of subcaudals; 2 anal plates on the anus.
Behaviour Oocatochus rufodorsatus are semi-aquatic, living in the grass near the water,in the rice fields, also found in the fields, graves, wet hills and gravel piles.They are good at swimming, like to drill holes, and mostly feeds on frogs and fish.They mate in spring and autumn.This species is ovoviviparous.They spawn in August to September and produce about 10 eggs at a time.
Distribution China: widely known in China, easily affected by artificial release, not in Gansu, Ningxia, Qinghai, Xinjiang, Tibet and other provinces.At abroad: in eastern Siberia,North Korea and northern Japan.Distribution around Bohai Sea: everywhere.
Conservation Least Concern (LC).
