第291页 仓鼠科 Cricetidae（비단털쥐과）

东方田鼠 Microtus fortis（비단털쥐）
英文名：Reed Vole
　　体长12 ~ 16cm；尾长超过体长的1／3；体重约60g。体背面黑褐色，毛基灰黑，毛尖栗棕色；体侧颜色稍淡；腹面污白，毛基深灰，毛尖白；尾上面与背同色，尾下面灰白；足掌只有基部着生毛，足垫5枚。栖息于低洼潮湿多水的环境中；可潜水，善游泳；夏季居于草甸中；秋后迁至山坡过冬。洞穴浅，结构简单，没有分支和仓库。主要以植物的绿色部分为食，也啃食杨柳枝条和嫩皮及种子。4 ~ 9月繁殖，7月达到高峰；年产3 ~ 4窝，每窝产5 ~ 11仔；2个月性成熟，寿命小于14个月。传播鼠疫等疾病。
 Body length 12 ~ 16cm; tail length exceeds 1 / 3 length of body length; body weight about 60g. Upperparts blackish brown, base of hair greyish black, hair tip chestnut – rufous sides of body lighter than upperparts; underparts dirt-white, base of hair dark grey, hair tip white; back of tail color same as upperparts, under tail greyish white; only base of feet with hair, foot mat 5. Live in the habitat where low – laying and wet, it can diving, good at swimming; live in meadow in summer; migrate to hillside in autumn. Burrow shallow and structure simple without branches and storehouse. Feed on green parts of plant, also eat branches, seed and tender bark of polar and willow. Breed during the period from April to September, reache 【reach】 peak in July; breeds 3 to 4 broods every year; produce 5 to 11 youngs a brood; young become adults after 2 months, life – span not more than 14 months. It spreads rat – pestilence and other diseases.