Wisconsin Odonata Survey

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Somatochlora walshii  (Scudder, 1866)
Brush-tipped Emerald


Corduliidae, Emerald Family

The medium-sized, dark brown striped emeralds have some pale markings on the thorax and abdomen, black legs, clear wings and brilliant green eyes. The thorax has a metallic bronze-green sheen and the abdomen is dark metallic black-green. Most species are uncommonly seen, but this may be largely due to their secretive nature. When flying, most species look alike which is why in-hand identifications of their anatomical features are often needed.

Status-Global/State:

Global: G5     Wisconsin: S4    

Distinguishing Characteristics:

This small, stocky, dark dragonfly has a few yellow markings on the side of the throax and the abdomen. The face is yellow. The brush-tipped emerald has a short abdomen, especially in the males. The length of the body varies from 1.6 to 2.0 inches. Juvenile females have orange-tinted wings, amber-tinted wing bases, and tan ovipositors.

Description of Habitat/Range:

Common throughout southern Canada and northern United States, it prefers lake outlets, pond outlets, and small streams that go through bogs, fens, or marshes. In Wisconsin, it has been found in scattered areas, mostly in northern counties.

Flight Season:

Mid-June to mid August in Wisconsin.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
14%
(15)
69%
(76)
14%
(15)
4%
(4)
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 brush-tipped emerald
Male brush-tipped emerald. © Dan Jackson

Male brush-tipped emerald
Photo of Male brush-tipped emerald
Male brush-tipped emerald. © David Hanson

Male brush-tipped emerald
Photo of Male brush-tipped emerald
Male brush-tipped emerald. © Mary Lynse

Male brush-tipped emerald
Photo of Female brush-tipped emerald
Female brush-tipped emerald. © Ryan Brady

Female brush-tipped emerald
Photo of Female brush-tipped emerald
Female brush-tipped emerald. © Ryan Brady

Female brush-tipped emerald



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