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Pachydiplax longipennis
Mature males develop a bluish-white pruinescence on the back of the abdomen and, in western individuals, on the thorax. They display this pruinescence to other males as a threat while defending territories at the edge of the water. Mature male with blue-white abdomen and thorax. Although the species name longipennis means "long wings", the wings are not particularly long. Females do, however, have a short abdomen that makes the wings look longer in comparison.
It is common and widely distributed in the United States.
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