During the day, a large number of two pairs of insects with large wings suddenly appeared at home, and they were not very good at flying and crawled on the ground. Does anyone know what it is?

This is a giant water ant. It is named because it usually appears before it rains. It is the general name of Isoptera, about 3000 species. Polymorphic insects; It has wings, the head, chest and abdomen of adult ants are reddish brown, and there is a light "+"pattern in the center of the front chest and back plate; Yellow wings and brown feet.

Insects with social organization often nest underground. There are main nests and auxiliary nests of different sizes, which are distributed around the main nest, and there are ant paths between the main nest and the auxiliary nest. There are different individual groups in a nest, and there is an obvious division of labor.

Harmfulness:

Can harm Chinese fir, Metasequoia glyptostroboides, Robinia pseudoacacia, paulownia, chestnut and other trees, houses and furniture. Termites nest in the soil, feed on tree roots, build mud quilts on trees, eat bark, and also invade xylem from wounds. Seedlings often die after being killed, and adult trees do not grow well after being killed. In addition, it will endanger the safety of the dam.

The harm of termites is closely related to the substances contained in trees, such as tannins, resins, acid-base compounds and the growth of trees. Macrotermes flavipectus is generally harmful to plants rich in fiber, sugar and starch, but less harmful to plants rich in fat. Trees themselves have certain resistance to termites, that is, termites like tree species, grow healthily and rarely do harm to termites.