Halloween Pennant Dragonfly

The Halloween pennant's characteristics vary depending on the sex and age of the dragonfly. The larvae (also known as a nymph or naiad) can grow from 5 to 6 cm in length and are yellow to green. Their rectal chamber contains gills and can be used to jet them through the water. Before they emerge as adults, the larvae develop compound eyes and tissue from the labium is withdrawn. As the dragonfly matures, the cuticle becomes thicker and the males develop their bright colors such as reds, yellows, and browns. The males also develop red rectangular spots on the front edge of each wing. They can also grow to 35 to 42 mm. The females are yellow.
http://animaldiversity.ummz.umich.edu/accounts/Celithemis_eponina/