They are similar to Aeshnidae in size, but the eyes are green and just barely meet at the top of the head.

Macromiidae, or Macromiinae, has been traditionally considered as a subfamily of Corduliidae (Kirby, 1890).

The naiads hatch after two weeks and are born with three gills for respiration (Lung 2001).

Naiads are found in rivers, streams, and lakes where there is water movement.

They mostly eat mosquito larvae, freshwater shrimp, fish and tadpoles (Young 1955).