While birding at Nonquon Sewerage Treatment Lagoons we came across these two Blue Dasher Dragonflies mating. The dragonfly which is completely blue is the male; the other is the female. The male grasps the female by the head with his claspers at the end of his abdomen. The male and female then fly in tandem and perch on a twig or plant stem. The female then curls her abdomen to pick up the seman from the male. The posture of the two dragonflies is called the "heart" or "wheel".
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