These large dragonflies are 6.8 to 8.4 cm long with a wingspan of more than 9 cm. The thorax is green and the abdomen is bluish to dark brown. The extremely mobile head has short antennae, well-developed mouthparts and two huge compound eyes. The face is yellowish-green with a “bull’s eye” pattern on the forehead.
The four membranous wings are wide at the base. The abdomen is slender, flexible and cylindrical.