Related Program: NatureNotes The Secret Indentity of the Railroad-Worm Beetle By Rudy Mancke • Sep 29, 2017 Related Program: NatureNotes TweetShareGoogle+Email A female "railroad-worm" beetle: lights on, lights out. (c) Aaron Pomerantz [CC BY 2.0] via Flickr The adult, male railroad-worm beetle. Credit The adult, male railroad-worm beetle. / skeeze [CC0 1.0]/Pixabay By day, a normal looking "worm." By night... it glows! The railroad-worm, or glow-worm, is a larva or larviform female adult of a beetle of the genus Phrixothrix in the family Phengodidae. Listen Listening... / 1:00 NatureNotes is a production of South Carolina Public Radio. Tags: NatureNotesNaturescetv.orgSCETV AppTweetShareGoogle+EmailView the discussion thread.