Besides autotrophic nutrition, plants exhibit heterotrophic modes. One such mode is parasitic nutrition, where a plant lives on or in another living organism (host) and derives its nutrition from it, causing harm to the host. Cuscuta (Amarbel) is a common example, wrapping around other plants and sucking nutrients. Another mode is insectivorous nutrition, seen in plants that trap and digest insects to fulfill their nitrogen requirements, as they often grow in nitrogen-deficient soils. The Venus flytrap and Pitcher plant are classic examples, using specialized leaves to capture prey.