Click beetles are the adult stage of wireworm, a pest of corn seed. The click beetle itself does not harm corn.
They use a funny strategy to redirect potential predators.
First they play dead by pulling in their antenna and legs close to their bodies and staying still for long periods of time. If that doesn't work they "fit a spine from the underside of their thorax into a groove on the underside of their abdomen. If the insect finds itself upside-down, it arches its body and with a loud click, snaps itself straight, launching into the air." This startles the potential predator and gives the beetle a chance fly away in order to escape.
Yesterday I tried to show my little neighbor the magic of the click beetle. Darn thing just ignored all attempts to turn it on its back and elicit a click and finally flew away. I lost all my credability as the local, somewhat eccentric bug lady. Oh well, today I can show him the new praying mantis egg case in my azalea bush and win back some loyalty!
says they glow like fireflie