California Department of Fish and Wildlife
Aquatic Biological Assement

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Aeshnidae Level 1 Level 2

Aeshnidae

 

Key Characters

Prementum and palpal lobes of labium flat, prementum widest in distal half, much narrower in basal half, without dorsal premental setae. Antennae slender, bristlelike, with 6 or more segments. Note the difference in coloration between preserved specimens (far left image) and live specimens (2nd image from left).

Tolerance typically 5, up to 8 in some genera (Anax)
Distribution CA, OR, WA, NV, AZ, Baja