I loved trying to catch these when I was little when we lived summers on a farm in New Jersey. I’d put them in bottle, watch them for a while and let them go! Oh, I miss fireflies!
I’ve never seen them here in Florida, but, flitting around the site above, there’s a map on firefly sitings, and someone said they saw them at Oscar Scherer State Park in Osprey, first time in more than 25 years.
I want to go on a firefly lighting bug quest! Here are some more Florida sightings.
Here’s the address to build a jar of fireflies, but you have to suffer through commercials first. These are little LEDs and a chip of some kind. http://www.instructables.com/id/Jar-of-Fireflies/