A very large group of species in the south and east. Split into several subgroups, all have an expanded terminal abdomen (the tail pipe flairs out into a knob at the end) in the males which gives them their Clubtail name. They often come in shades of green, yellow and black and are often found sitting on the ground. Can be very camouflaged and net wary. Fast flight in the highest dragongear when escaping or cruising.

In good habitat can be found in large numbers. Many are strictly clear water stream users; others are open water species. This is one of the toughest groups for new dragonfly enthusiasts to master. Like the skippers in the butterfly world. Arkansas has 24 species of Clubtails, constituting over one fourth of the state dragonfly species.