The wingspan is 86–120 mm. It is a very fast flyer and is attracted to both sweet-smelling flowers and light.
Most instars are green with a brown backward curving tailhorn and a pair of white or red and yellow dorso-lateral stripes. Some instars have various coloured markings along the sides, including a blue eyespot on each side of the metathorax. The final instar is reddish brown.