This stocky gray-green dragonfly has a slender black abdomen, usually with a pale tip and brown-black stripes on the thorax. Breeding in still waters, the females of this genus are the only clubtails with ovipositors. Difficult to catch, it is very wary and quick. The eyes are blue. The males have distinctive, widely forked claspers.
Usually found at bog-edged ponds, small marshy lakes, slow streams, and rivers, this species ranges abundantly throughout the northern Midwest and parts of Canada. It is uncommon but widely distributed throughout Wisconsin.
Early June through mid-July in Wisconsin.