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Blue Dasher

Pachydiplax longipennis


Teal-green eyes and periwinkle blue body. Some variety of skimmer.


Shaded pond area in a beer garden on a warm day


Pruinescence gives the body a frosted appearance covering the thoracic stripes. "Males display the pruinescence on the back of the abdomen to other males as a territorial threat" (Wikipedia).

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CoralAvery 7 years ago

I changed it to Blue Dasher and I agree. It seemed to have the body of a pondhawk and face of a dasher, but wikipedia says it has pruinosity so the coloration looks frosted and the thoracic stripes are hidden. It reflects ultraviolet and is most common with male skimmers. I guess I learned something new today. Thanks for identifying it (:

Geodialist 7 years ago

Pondhawks -- eastern or western, male or female -- have green faces; Blue Dashers have white faces. I say Blue Dasher, since your specimen has a white face.

CoralAvery 7 years ago

This page says they are found throughout the continental US as well as in the Pacific Northwest so I suppose Blue Dashers can be found in California.

But I believe what I found is a western pond hawk since it does not have thoracic stripes and I'm sure it's not an eastern pondhawk based on the differences in abdomen and appendage shape.

Geodialist 7 years ago

Looks like a male Blue Dasher dragonfly (Pachydiplax longipennis), a species that is common in the eastern USA. Are there Blue Dashers on the West Coast?

Spotted by

San Diego, California, USA

Spotted on Aug 12, 2012
Submitted on Nov 24, 2013


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