Female Seaside Dragonlet (Erythrodiplax berenice). Year round resident of peninsula Florida. This one seen in a grassy area, near a fresh water pond and marsh....and also near a mangrove forest. Small and easily missed at 1.3 inches.
Here's a nice piece about their behavior from the "Northeast Naturalist," and my friends at Eagle Hill Institute. If you are in Maine this summer, be sure to check out all the wonderful activities there.