Wisconsin Odonata Survey


Arigomphus villosipes  (Selys, 1854)
Unicorn Clubtail

Gomphidae, Clubtail Family
"Most Wanted" Species


Global: G5     Wisconsin: S2S3    

Distinguishing Characteristics:

From 2.0 to 2.3 inches long, the unicorn clubtail has a gray-green thorax with black shoulder stripes. The abdomen is mostly black with pale dorsal stripes, and with fringes of the clubtail rusty brown and the end yellow. The legs are mostly black, with pale streaks on shins and sometimes on thighs. The eyes vary from gray-green to bright green.

Description of Habitat/Range:

Found in eastern US, from Tennessee northward to Ontario, the unicorn clubtail prefers ponds, lakes, and slow streams with muddy bottoms and little submerged vegetation. At lakes, they seem to prefer inlets. Wisconsin is at the western edge of the range. It is only known from a site in Sheboygan County.

Flight Season:

Throughout its range, the flight season is from early May to late August. In Wisconsin, they have been found in late June and July.

Shading illustrates monthly percentages of the total flight season records for the species. Each flight season record is a unique date/location/observer combination where one or more adult or an exuvia was recorded (excludes nymphs). The actual number of flight season records for each month is shown in parentheses.

Flight seasons begin earlier in the southern part of the state, often by a week or more. Also, flight charts may not be accurate for rare species because of few data available.
View user-submitted photos

(Click on photos to enlarge)
Photo of Male unicorn clubtail
Male unicorn clubtail. © Dan Jackson

Photo of Male unicorn clubtail
Male unicorn clubtail. © Dennis Paulson

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