中国林蛙Rana chensinesis
地方名：蛤蟆、哈士蟆
形态特征：雄性体长50mm左右，雌性略大。体形略瘦长，头长略大于或等于头宽，鼓膜圆，犁骨齿两小团，略呈椭圆形，背侧褶不平直，在鼓膜上方向外曲折呈角状弯曲；后肢较长，贴体前伸时胫跗关节达眼前或鼻眼间。皮肤较光滑，背部及体侧有稀散大小疣粒，排列不规则。雄性具一对咽侧内声囊，第一指有4团瘤状灰色婚垫。生活时体背面颜色有变异，多为土黄色或黄褐色，疣粒或周围时呈黑色；腹面乳白色或肉色；颞部和鼓膜褐色或褐色，四肢背部具深褐色横纹。
生活习性：生活于海拔100～2000m的山地和丘陵地带，多活动于草丛和林下。10月开始迁移至附近河流或水塘中群集越冬，翌年3月底出眠进入繁殖期，产卵后滞留水域一段时间后迁移到附近的草丛和山坡林下。卵团常产于水流缓慢的河湾或多有水草的静水凼中。多于夜间活动，捕食各种小型无脊椎动物。
地理分布：中国特有种，广泛分布于我国北方诸省，南方见于湖北、四川、重庆。
环渤海地区分布：均有分布。
生存现状：无危（LC）。
Anura Ranidae Rana
11.Rana chensinesis
Description Adult males SVL normally up to 50mm; females bigger than males; HL longer than HW; snout is round; two oval round vomerine teeth; dorsolateral folds distinct;hindlimbs long; the tibio-tarsal articulation reaching the eye anterior or nostril.Skin is smooth, with warts on the dorsum and the lateral, with no orderly pattern; males have two vocal sacs in the throat and 4 warty gray nuptial pads on the first finger.Dorsum is khaki or fulvous, black skin around warts; milky or flesh pink belly; brown temple and tympanums;dark brown transverse stripes on the back of their limbs.
Behaviour Rana chensinesis live in elevations about 100m to 2,000m in the mountains and hills, acting in the grass or under the tree.From October, they start to move to the rivers or ponds to spend the winter.After finishing their hibernating at the end of March, they start to breed, laying their eggs on the grass in the still waters or slow-moving streams.They come out at night and feed on all kinds of small invertebrates.
Distribution Native to China; China: widely in north of China, Hubei Province, Sichuan Province and Chongqing in south of China.Distribution around Bohai Sea: nearly everywhere.
Conservation Least concern (LC).
