Hope this is an acceptable contribution here. I’ve been converting areas of my Midwestern yard to native plant habitat for the past 2+ years. It’s sparkling with fireflies tonight while the surrounding grass yards are dark. Gives me a bit of a boost to get ready for tackling the sprouts of pokeweed and thistle tomorrow.
I see them in the trees at first in east Tennessee. They just slow flash for around a second. Now just starting to get some in the yard with the classic “J” bug dip as they light up. One of the best parts of summer.