钉螺,它不会飞、不会跳、也不会游,只能爬,而且行动缓慢,活动范围小。所以,一般来说,是定居的。但是它也可能通过某些自然的条件和人为的因素而扩散。据调查了解,一些农事活动,如在有钉螺的地区打湖草、割青草、铲草皮积肥;割捞水草喂鱼;移栽秧苗;养殖水生植物作猪饲料等,就可能将钉螺带到其它地方去,只要那里具备钉螺生存的条件,钉 Snails, it will not fly, will not jump, it will not swim, can only climb, and slow, small range of activities. So, in general, it is settled. But it may also spread through some natural conditions and human factors. According to the survey, some agricultural activities such as snail farming in the snail area, cut grass, shovel straw fertilizer; cutting water and fish feeding; transplanting seedlings; aquaculture of aquatic plants for pig feed, it may be snails to other Where to go, as long as there is snail survival conditions, nail