东亚腹链蛇Hebius vibakari
曾用名：灰链游蛇
形态特征：身体细小，成体全长400～700mm。体背棕褐色，头背和背脊暗棕绿色。上层鳞淡黄，边缘黑色。枕部有一对浅色弧形细纹，纹两侧缀有黑色斑点。腹面浅黄色或灰白色，每一腹鳞两侧有黑色或深棕色斑点，斑点前后相连，形成两条链状线条，自颌下达尾梢。眼后方有一块白色圆形斑。上唇鳞多为7枚，呈2-2-3式，下唇鳞6～8枚，背鳞多为19-19-17行，除最外一行平滑外均起棱。腹鳞143～156枚，尾下鳞41～70对，肛鳞二分。
生活习性：生活于山区草丛中，爬行迅速，活动敏捷。以昆虫、幼蛙及幼蟾为食。卵生，7月中下旬产卵，每产2～5枚，孵化期约为40天。
地理分布：国内分布于东北三省；国外分布于朝鲜、俄罗斯远东地区。
环渤海地区分布：仅见于辽宁。
生存现状：易危（VU）。
注：东亚腹链蛇指名亚种H.vibakari vibakari和东亚腹链蛇H.vibakari danjoensis大岛亚种分布于日本。
Squamata Colubridae Hebius
56.Hebius vibakari ruthveni
Description Adults up to 400-700mm TOL, body is slender and small.Body dorsum is brown, dorsum and spine are dark brownish green; upper scales are yellowish with black rim; a pair of light curved pinstripes with black spots on both sides of the stripes at the occipital part; ventral is light yellow or greyish white, with black or dark brown spots on each side of ventral scales; spots connecting before and after, forming two chain lines, reaching the tail tip from the bottom of the jaw; a white round spot behind eyes; 7 supralabials are arranged in 2-2-3 rows and 6-8 infralabials; dorsal scales are mostly arranged in 19-19-17 rows, the outermost line is smooth, others are all ribbed; 143-156 ventral scales; 41-70 pairs of subcaudals; 2 anal plates on the anus.
Behaviour Hebius vibakari ruthveni live in the mountains and grass, and they crawl quickly and eat insects, young frogs and slugs.This species is ovoviviparous.They spawn in mid-to-late July, and produce 2-5 eggs at a time.The incubation duration is 40 days.
Distribution China: Liaoning, Jilin, and Heilongjiang.At abroad: in North Korea and the Russian Far East.Distribution around Bohai Sea: only in Liaoning Province.
Conservation Vulnerable species (VU).
