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A dragonfly is an insect belonging to the order Odonata, suborder Anisoptera (from Greek Î±Î½Î¹ÏÎ¿Ï anisos uneven + ÏÏÎµÏÎ¿Ï pteros, wings, because the hindwing is broader than the forewing).ossils of very large dragonfly ancestors in the Protodonata are found from 325 million years ago (Mya) in Upper Carboniferous rocks; these had wingspans up to about 750 mm (30 in).
Dragonfly Characteristics. A Dragonfly has two large compound eyes which take up most of its head. Dragonflies have long, delicate, membranous wings which are transparent and some have light yellow colouring near the tips. Their bodies are long and slender and they have a short antennae.