Insectivorous plants or carnivorous plants are autotrophs but are specially adopted for trapping and digesting small animals and insects. These plants are thus, partly autotrophs and partly hetrerotrophs. They grow in nitrogen-poor habitats and use insects by their colour and scent, trap them in some way, digest enzymatically absorb and assimilate the product, mostly amino acids. Pitcher plants, bladderwort, etc. are insectivorous plants.