“名字带了牛,其实不是牛,背着小房子,喜欢慢慢走。”这个谜语说的就是人们常见的蜗牛。怪异的体貌特征蜗牛,俗称水牛儿,从水中移居陆地已有3亿多年了。现在,地球上大约有2.5万多种蜗牛。最大的非洲大蜗牛,身长可达25厘米,体重约650克。 “Name with a cow, in fact, not a cow, carrying a small house, like walking slowly.” The riddle is that people are common snails. Weird physical characteristics Snail, commonly known as buffalo, migrate from the water land more than 300 million years. There are now more than 25,000 snails on the earth. The largest African snail, up to 25 cm in length and weighs about 650 grams.