Amazing Dragonfly Insect Dragonfly, or Darning Needle, the name for an order of large, beneficial insects that feed on harmful insects such as gnats and mosquitoes. Dragonflies occur in the swamps and streams of all temperate and tropical regions. There are two suborders—damselflies and true dragonflies. A dragonfly is an insect belonging to the order Odonata, the suborder Epiprocta or, […]