This amazing plant is native to a small region in the Carolinas. There are six small trigger hairs inside each trap. One hair touched twice, or two hairs touched once, signals the trap to snap shut.
Empty traps reopen in a day or so.
Traps with prey remain closed for a week or two. Then, the trap will reopen exposing the dry shell of the victim. Flytraps do not need regular feeding and can go long periods without insects. If you are growing them in a condition where no insects can get caught, such as a cool greenhouse, feeding one trap a small insect every couple months is probably beneficial. Venus's Flytraps are perennials that form bulbs.