Ants work hard most of the year. So where do they go to look for food in the cold winter? How do they spend the winter? It turns out that smart ants are ready long before winter. They first carry weed seeds for sowing next year; At the same time, they carry aphids, scale insects, horned cicadas and grey butterfly larvae until they spend the winter in their nests, and absorb excreta from these insects as food (milk honey). Why do ants know that winter is coming? From the point of view of modern science, this instinct of ants is controlled by the annual biological clock in their bodies. In other words, they do a good job of food reserves during the overwintering period according to the operation law of the annual biological clock.