The most well known carnivorous plant is the Dionaea muscipula, or Venus Flytrap (Family Drosercaeae). Although this species is commonly sold at local nurseries, it is a threatened species that only grows along the coastal swamps of North Carolina and northern South Carolina.
The trap mechanism is actually a modified leaf. The upper side of the trap is red (resembling meat) in order to attract flies and other insects. Tiny hair-like protrusions serve as a sensory mechanism to tell the trap when to close. When three of the inside hairs are stimulated, a weak electrical signal triggers the cells at the base of the trap to swell with water, closing the trap and capturing the insect. Special enzymes then digest the insect and the plant absorbs essential nutrients.