Epiaeschna is a genus of darners in the dragonfly family Aeshnidae. They are commonly known as three-spined darners. Species within this genus are generally known as "hawkers" (Old World) or "darners" (New World). Aeshna, or the mosaic darners, is a genus of dragonflies from the family Aeshnidae. The Aeshnidae, also called aeshnids, hawkers, or darners, is a family of dragonflies. Green darners leave their northern ranges in September and migrate south. Adult darners catch insects on the wing, including ant alates, moths, mosquitoes, and flies.