Nebraska Dragonflies and Damselflies
Gomphus (Gomphurus) vastus
The Cobra Clubtail (subgenus Gomphurus) is a medium-sized black dragonfly with yellow or green markings and a very wide club. It can be recognized by the lateral yellow spots on its club: small dots on abdominal segment 8 and large ones on segment 9. The bases of the wings are occasionally tinted with yellow. The eyes are green, and the face is yellow with a broad blackish stripe. It is often found perching horizontally on rocks along rivers or in the brush near the water's edge. The female is similar to the male, but with a smaller club and paler markings.
Cobra Clubtail male
Green indicates accepted county record (specimen or photograph).
Size: 47-57 mm (1.9-2.2 in)
Habitat: large rivers with moderate to strong current
Great Plains Range: TX, OK, KS, NE, MO, IA, MN
Flight season: early June to early July
|Back to Top|||||Dragonfly Page|||||Damselfly Page|||||Home Page|