Dragonflies on sale

High over a bucolic mill pond these dragonflies dip, swirl and dive in a colorful air show courtesy of nature's wonders. No, I did not lift that sentence from some flower seed catalog or farmer's almanac. Dragonflies are amazing insects, darting and skittering about with their over-sized wings and generally slim bodies or fuselages. At on sale some point in their evolution, they must have breathed fire, based on their name, which would have made them among the baddest bugs around.