Larger in size
Strong fliers Eyes touch the top of the head and almost come together Fore- and hind-wings are not identical in shape Wings held away from the body at an angle of 180° when at rest Nymph breathe through posterior tracheal gills |
Smaller in size
Weak fliers Eyes are well separated Fore- and hind-wings are identical in shape Wings are held close to the body when resting Nymph breathe through caudal gills |
(Worldwide Association of Dragonflies, 2002)