鼠(类),即啮齿动物,通称老鼠,有的地方叫耗子、耗儿,是哺乳动物中种类最多的类群的总称,包括动物界、脊索动物门、哺乳纲、啮齿目和兔形目所属种类。其共同特征是门齿呈锄状并终生生长,无犬齿、且齿隙很宽。在鼠类防治工作中,习惯上将外形象鼠的食虫目种类(如水麝鼩和缺齿鼹也当害鼠对待)。食肉目的银鼬虽然被称为银鼠和香鼠,但不是 Mouses, or rodents, commonly known as mice, are called rats and their consumption in some places. They are the most common mammalian species, including the animal kingdoms, chordates, mammalian, rodents, species. Their common feature is that the incisors are hoe-like and grow for life, with no canine teeth and a wide backlash. In the prevention and treatment of rodents, it is customary to look like the carnivores (such as water musk deer and echidna). Although the purpose of carnivorous meerkat is called silver rat and sweet mouse, it is not