白条锦蛇Elaphe dione
地方名：家长虫、草蛇、麻蛇
曾用名：枕纹锦蛇
形态特征：体型中等，成体全长800～1000mm。体背苍灰色或灰褐色，少数浅棕色，个别红褐色，有许多不规则黑色横斑，体背具有3条浅色纵纹，中央1条延至尾端，两侧两条止于泄殖肛孔。腹面黄红或灰白色杂有黑斑点。上唇鳞8枚，呈3-2-3式，下唇鳞多10枚。背鳞多25-25-19行，除正中央7～19行起微棱外，均光滑。腹鳞170～206枚，尾下鳞46～77对，肛鳞二分。
生活习性：生活于平原、丘陵、山地、田野、林间、路旁，是我国北方常见种。以鼠、鸟、鸟卵、蛙、蟾蜍、蜥蜴等为食，偶尔也吃蛇。卵生，7—8月产卵，每产6～15枚，从9月下旬至翌年5月初为蛰眠期，越冬地点多在鼠类废旧巢穴、树根下洞隙等处。
地理分布：广布种，广泛分布于我国北方诸省，南方见于湖北、安徽；国外分布于西自乌克兰，向东经哈萨克斯坦、俄罗斯南部（达远东地区）及朝鲜、阿富汗、伊朗北部。
环渤海地区分布：均有分布。
生存现状：无危（LC）。
50.Elaphe dione
Description Adults up to 800-1,000mm TOL, medium-size body.Dorsum is dark grey or greyish brown, a few dorsum is light brown and some reddish brown; body has a lot of irregular black transverse spots; three light ventral stripes on the body dorsum, middle one extending to the tail and other two stripes on both sides connected at the cloacal anus holes;ventral is yellowish red or greyish white, with black spots; 8 supralabials are arranged in 3-2-3 rows; mostly 10 infralabials; dorsal scales ae mostly arranged in 25-25-19 rows,with the exception of the 7-19 rows on the center of the body, other parts are smooth; 170-206 ventral scales; 46-77 pairs of subcaudals; 2 anal plates on the anus.
Behaviour Elaphe dione live in plains, hills, mountains, fields, forests and roadsides.They are common species in northern China.They have a wide range of foods and usually feed on rats, birds, bird eggs, frogs, toads, lizards and so on.Sometimes they also eat snakes.They are ovoviviparous animal and their breeding season is from July to August.They produce 6-15 eggs at a time, and the dormant period is from late September to the beginning of May next year.Their wintering sites are usually used nests of rats, the holes under the roots of the tree and other places.
Distribution China: every province, widely in northern China, Hubei and Anhui.At abroad: in Ukraine, Kazakhstan, southern Russia and North Korea, Afghanistan and Iran.Distribution around Bohai Sea: everywhere.
Conservation Least Concern (LC).
