I was leveling out a spot for a hive (in the dark) with a rake when I saw a glow in the dirt I was leveling. Can’t say for sure if it was originally ON the dirt or IN the dirt. I read on the Internet that even the eggs of fireflies can have a slight glow to them! I haven’t run across any eggs yet.
Years ago we didn’t have a single firefly in our area. Don’t know if it was global warming or the cans of fireflies we would bring home from Grandma’s in Ohio, but now we have billions of the things.
The photo of this larva kind of looks like one of those ear creatures that Khan used in Star Trek 2 does it.