Wisconsin Odonata Survey

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Ophiogomphus carolus  Needham, 1897
Riffle Snaketail


Gomphidae, Clubtail Family

Status-Global/State:

Global: G5     Wisconsin: S3    

Distinguishing Characteristics:

The riffle snaketail male has a greenish thorax with black shoulder and thoracic stripes. The length of the body varies from 1.6 to 1.8 inches. The female is similar to male, but with paler coloration. The legs are usually black, in some cases thighs can have pale green stripes. The abdomen is usually black with pale green markings with dorsal stripes and some spots at the end of the abdomen. The eyes can vary from green to pale blue. Ophiogomphus species are very similar to each other in some aspects, careful inspection is needed to identify those snaketails.

Description of Habitat/Range:

Found throughout northeastern United States and southeastern Canada, the riffle snaketails prefer woodland streams and rivers that are clear, fast-moving, and with sand or rocks. Uncommon in Wisconsin, it is widespread throughout northern Wisconsin.

Flight Season:

Late May to mid-August in Wisconsin.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
1%
(1)
5%
(5)
73%
(69)
18%
(17)
1%
(1)
1%
(1)
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

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Photo of Male riffle snaketail
Male riffle snaketail. © Dan Jackson

Male riffle snaketail
Photo of Male riffle snaketail
Male riffle snaketail. © Dan Jackson

Male riffle snaketail
Photo of Male riffle snaketail
Male riffle snaketail. © Ryan Brady

Male riffle snaketail
Photo of Female riffle snaketail
Female riffle snaketail. © Dan Jackson

Female riffle snaketail
Photo of Female riffle snaketail
Female riffle snaketail. © Dan Jackson

Female riffle snaketail
Photo of Female riffle snaketail
Female riffle snaketail. © Jim Lind

Female riffle snaketail



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