Carnivorous plants are also known as insectivorous plants. Their ability to trap and digest insects has evolved as an adaptation to a hostile environment these plants often grow in thin soils that are nearly devoid of the nitrogen that most plant rely upon.
Carnivorous plants have various methods of attracting and catching their prey.
One of the most familiar examples is the Venus fly trap. Once inside, the insect is likely to brush up against a series of trigger hairs, which causes the trap to snap shut. Pitcher plants, on the other hand, drown their prey in the fluid that accumulates inside their cup-shaped leaves. Digestive enzymes excreted by the plants then allow them to digest their insect prey, which is rich in nitrates. You can grow some carnivorous plants in a terrarium on a bright windowsill.