Insect-eating plants, such as pitcher plants, flytraps, pitcher plants, salsola, etc., seem to be preying on insects, but in fact they can't directly swallow and digest insect carcasses. They can only degrade insect carcasses by secreting highly corrosive substances (acid, alkali or enzyme), and obtain a very small amount of small molecular organic matter from the degraded substances. The purpose of obtaining these substances is only to supplement trace elements, mostly N elements. The element C needed for their growth still depends on sunlight and photosynthesis. Judging from the energy flow direction, the energy released by their degradation of insect carcasses has not been absorbed and utilized. Therefore, in terms of material flow and energy flow, insects do not play a decisive role for them. Strictly speaking, they don't eat meat. They are all green plants and autotrophs.