美国青蛙和牛蛙同属两栖纲,无尾目,蛙科,同为水陆两栖食用蛙,原产地为美国,其外部形态很相似,但能区分。 一、肤色:美国青蛙(下面简称“美蛙”)一般黄褐色,肤色可随环境而变化,具有深浅不一圆形和椭圆形的斑纹,腹部白色。牛蛙冬季为浓褐色,春末鲜绿色,秋天淡褐色,具有深浅不一的虎斑状横条,腹部白而有暗褐色斑纹。 二、体型:美蛙体型较小,成年蛙体长13厘米左右,体重450～600克;牛蛙较美蛙大,体长可以长到20厘米左右,体重可达500～1500克。美蛙头较小,形似一 American frogs and bullfrogs belong to the amphibia, Anura, Frogs, and amphibious edible frogs, originating in the United States. Their external shapes are similar but can be distinguished. First, the color: the United States frog (hereinafter referred to as the “frog”) generally brown, color can change with the environment, with varying degrees of round and oval stripes, abdomen white. The bullfrogs are dark brown in winter, bright green in late spring, light brown in autumn, with tiger-like horizontal stripes of varying shades, white belly with dark brown markings. Second, the body size: American frog body size smaller, adult frog body length of about 13 cm, weighing 450 to 600 grams; bullfrog than the American frog, body length can grow to about 20 cm, weighing up to 500 ~ 1500 grams. The frog head is smaller and looks like one