Western Pondhawk
Erythemis collocata
Allan Ostling found this female at Papago Park in Phoenix, Arizona on 12 Aug. 2016
This dragonfly is found near shallow ponds through much of western United States. Adults often take mosquitoes as prey and should be appreciated for this and their exquisite beauty. The freshly emerged males are also emerald green, but as the insect ages it acquires a ashy, powdery appearance.