Pondhawk

Common or Eastern Pondhawk (Erythemis simplicollis). This is an immature male; his thorax will turn completely blue as he reaches maturity. Superficially like the common Blue Dasher, but larger, with clear wings, and white appendage. These Pondhawks are known as great predators, and capture and eat dragonflies their own size, including others of their own species. So look out, Pondhawks! A few days later, and some distance from water, I found a female of the species, electrically green: