The green darner or common green darner, after its resemblance to a darning needle, is a species of dragonfly in the family Aeshnidae. One of the most common and abundant species throughout North America, it also ranges south to Panama. It is well known for its great migration distance from the northern United States south into Texas and Mexico. It also occurs in the Caribbean, Tahiti, and Asia from Japan to mainland China. It is the official insect for the state of Washington in the United States.
The green darner is a large dragonfly; males grow to 76 mm in length with a wingspan up to 80 mm.
Females oviposit in aquatic vegetation, eggs laid beneath the water surface. Nymphs are aquatic carnivores, feeding on insects, tadpoles, and small fish. Adult darners catch insects on the wing, including ant alates, moths, mosquitoes, and flies. From Wikipedia
