Minnesota Dragonfly

Extra-striped Snaketail

Ophiogomphus anomalus

The Extra-striped Snaketail is a small and rare Snaketail. This species is listed as Endangered in Wisconsin and a Species of Special Concern in Minnesota. Their nymphs are found in very specific habitats in clear, cold mid-sized rivers. Adults are seldom seen

Identification

Field Marks
  • Average adult size is approximately from 1.5 to 1.7 inches
  • Green face with bold crossline and other facial markings (mustache and goatee) and green eyes
  • Green abdomen with bold shoulder stripes
  • Mid thoracic stripes have an extra line running diagonally between them forming a 'N' shape
  • Dark abdomen with yellow arrow shaped top spots on segments 3 to 8, square spot on segment 9 and round spot on segment 10
  • Yellow side patches on segments 7 to 9 outlined on the bottom with black rim
  • This specimen is immature. It was raised from a nymph that was captured in the St Louis River in Northern MN. Thanks to Mitch Haag for raising it and Curt Oien for giving me the chance to photograph it

Click on photos above for a close-up view.

Natural History

Behavior

One of the most rare species in Minnesota. Extra-striped Snaketail nymphs are found in between boulders in very swift current in clean cold rivers. Adults spend a lot of time on the wing, mostly away from the water, and rarely perches low

Habitat

Clear, cold, mid-sized rivers with large boulders and swift current

Reproduction

Female lays eggs alone by dipping abdomen into water near desired nymph habitat

Range Maps
  • Click on the icons above for this species' range maps

    Click here for county and state checklists from Odonata Central.

    Range maps and checklists courtesy of Odonata Central. Copyright © 2016 OdonataCentral. All Rights Reserved. Abbott, J.C. 2006-2018. OdonataCentral: An online resource for the distribution and identification of Odonata. Available at www.odonatacentral.org.