Most species of fireflies thrive as larvae in rotting wood and forest litter at the margins of ponds and streams. And as they grow, they more or less stay where they were born. Some species are more aquatic than others, and a few are found in more arid areas—but most are found in fields, forests and marshes. Their environment of choice is warm, humid and near standing water of some kind—ponds, streams and rivers, or even shallow depressions that retain water longer than the surrounding ground. (This is from debi's article.)
I'm gonna call someone who lives near The Grand Kankakee Marsh, just south of me. It's a perfect habitat according to the description.
Oh, and I miss 'Tang' and the PB&J that comes in the jar all swirled together.