Venus flytraps can actually count to make sure they aren't wasting energy on a false alarm.

In 2016, a researcher named Rainer Hedrich at the University of Würzburg discovered how these plants use math to survive. Each leaf has tiny trigger hairs that act like sensors. When a bug brushes against one, it sends an electric signal through the plant. The first touch starts a silent 20-second timer. If nothing touches the hairs again during that time, the plant ignores it as a mistake, like a raindrop or a falling leaf. If a second touch happens before the timer runs out, the trap snaps shut in less than a blink of an eye. But the counting doesn't stop there. The plant waits for three more touches from the struggling bug to prove it is alive and juicy. Only after the fifth touch does the plant start making special juices to break down the insect. This clever system saves the plant a lot of work. It takes a huge amount of energy to close the trap and digest food. By counting, the Venus flytrap makes sure it only works when it has a guaranteed high-protein snack. These amazing plants are only found in the wild in a small part of North and South Carolina.