团花锦蛇Elaphe davidi
地方名：花长虫
曾用名：黑镶锦蛇
形态特征：中等大小无毒蛇，成体全长800～1200mm。体型较粗，头略大，略呈三角形，与颈区分明显，眼较大，瞳孔圆形。成体、亚成体和幼体体色各不相同。成体褐色，背中央及两侧有3行镶细黑边的深褐色圆斑，中央一行圆斑大，位于背中线上，大圆斑之间有黄白色花斑相连，侧面两行的圆斑小，左右相对，其间无斑纹连接，各个小圆斑位于大圆斑间隔处的两旁。幼体灰褐色，头顶有2道深褐色或棕褐色斑纹，背面圆斑棕黑色。亚成体灰色，圆斑深褐色。上唇鳞8枚，呈3-2-3式，下唇鳞11～13枚。背鳞最外一行平滑，至脊鳞起棱渐强，25-23-19行，腹鳞雄性155～181枚，尾下鳞53～72对，肛鳞二分。
生活习性：生活于平原、丘陵，常在山坡、河谷、山地蚕场等处活动，也常树栖。常被发现在鸟类繁殖季节袭击鸟巢，吞食鸟卵及幼鸟。也吃蛙类、蜥蜴等，偶尔也吃蛇类。8月产卵，每产7～8枚。
地理分布：国内见于辽宁、北京、天津、河北、山东、内蒙古、山西、陕西；国外分布于朝鲜半岛。
环渤海地区分布：均有分布。
生存现状：易危（VU）。
注：经标本检查，黑龙江团花锦蛇是棕黑锦蛇幼体的误记。
49.Elaphe davidi
Description Adults up to 800-1,200mm TOL, medium-size body, non-toxic.Body is stubbed; head is slightly bigger and in triangle shape, distinct from the neck; eyes are big;pupils are round; adult's and sub-adult's body color is different from the juvenile's.Adult's color are brown, with three rows of dark brown round spots with fine black rim on the center of dorsum and both sides; one row of big round spots in the midline, yellow and white speckles for connection; small round spots on body sides; left and right opposite, with no striped link, each small round spot on both sides of the large round spots interval; juvenile's body color is grey brown; 2 rows of dark brown or brown stripes on the top head, with dark brown and tan brown stripes; blackish brown round spots on the dorsum.Sub-adult's color is grey, with dark brown spots; 8 supralabials are in arranged 3-2-3 rows; 11-13 infralabials.The outermost row of dorsal scales are smooth, stronger and ribbed, arranged in 25-23-19 rows; the male has 155-181 vernal scales; 53-72 pairs of subcaudals; 2 anal plates on the anus.
Behaviour Elaphe davidi mostly live in plain and hills, often act in slopes, valleys,silkworm fields in the mountain or other places, also live in the tree.They are often found to attack nests during bird breeding season, devouring bird eggs and young birds.They also eat frogs, lizards and so on, occasionally also eat snakes.They spawn in August and produce juveniles 7-8 eggs at a time.
Distribution China: in Liaoning, Beijing, Tianjin, Hebei, Shandong, Inner Mongolia,Shanxi and Shaanxi.At abroad: Korean Peninsula.Distribution around Bohai area:everywhere.
Conservation Vulnerable (VU).
Note After specimen examination, Elaphe davidi in Heilongjiang Province is the mistaken record of Elaphe schrenckii.
