A fierce Cobra Clubtail enjoys a snack, while guarding his rock beside the Great Miami River. Cobra Clubtails live near large rivers. I have found several Cobras along the Great Miami River near Miamisburg. My sightings range from June 2nd through August 5th. 

This is a Cobra Clubtail - one of the coolest dragonfly names ever. This species gets its name from the wide club, which resembles a cobra's hood. 

The most important identifying feature for a Cobra Clubtail is actually not the club. It's the thick, black facial stripe. This stripe will easily distinguish a Cobra from its closest look-alike species, Skillet and Midland, both of which have unmarked faces. 

Another female Cobra Clubtail. Females also have wide clubs, although not as wide as the males. Notice that there is no yellow on the top of Segments 8 and 9 on the club. A Midland Clubtail would have a small yellow triangle on the top of Segment 8. 

Cobra Clubtail - all black on the top of S8 & S9. 

Midland Clubtail - yellow triangle on the top of S8.

Handsome Clubtail - yellow spots on the top of S8 and S9. 

This is a female Cobra Clubtail, showing off her black facial stripe.  

Notice that the stripes on the front of this Cobra's thorax are thin and angled. Those stripes would be wider and parallel in look-alike species such as the Midland and Skillet Clubtails. Also, notice that the spot on the side of Segment 8 (the club) is a very small square.