Subject: Glow worm?
Location: Rimrock, AZ
April 25, 2017 8:27 pm
Found this on the floor of my apartment tonight. What is it?
This does not look like a typical Glowworm to us. Glowworms or Railroad Worms are the larvae of beetles in the family Phengodidae. This doesn’t look like a Firefly Larva from the family Lampyridae either. It does look like a Wireworm, the larva of a Click Beetle. There are bioluminescent Glowing Click Beetles in the genus Deilelater, but we have not been able to locate an image of the larva. BugGuide only lists North American sightings in Texas and Florida, however, BugGuide does indicate “D. physoderus GA-FL-AZ, Mexico.” Though that is circumstantial, our best guess right now is that this might be the larva of a Glowing Click Beetle.