Venus flytraps are carnivorous plants native to a small region of wetlands in the eastern United States. They have however been introduced to other areas of the world and are popular as houseplants. The flytrap snaps shut and imprisons its prey when triggered by a time- and touch-sensitive mechanism. Once the prey has been digested, the trap re-opens ready for another victim. Each individual trap on the Venus flytrap can only operate three or four times, after which it photosynthesizes like a normal leaf or dies back.

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