THE XERCES SOCIETY FOR INVERTEBRATE CONSERVATION

Aquatic Invertebrates in Pacific Northwest Freshwater Wetlands
An Identification Guide and Educational Resource

Aeshnidae
(darners)
Abdomen is generally more elongate than in most dragonfly larvae. Flat labium. Antennae have 6 or 7 long, thin segments.

Corduliidae
(emeralds)
scoop-shaped labium witrh clearly visible, evenly-sized teeth on the lobes. Short stiff points at the tip of the abdomen; head lacks frontal horn.

Libellulidae
(skimmers)
Labium is scoop-shaped and generally lacks teeth; if lobes of labium do have jagged teeth, then the tip of the abdomen will carry long spines.

Petaluridae
(petaltails)
Labium is flat; antennae have 6 or 7 short, thick, fuzzy segments. Dark bodies (grey to black).

Dragonflies uncommon in wetlands
Cordulegastridae
(emeralds or green-eyed skimmers)
Macromiidae (cruisers)
Gomphidae (clubtails)