Wisconsin Odonata Survey

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Somatochlora minor  Calvert in Harvey, 1898
Ocellated 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:

A small dark emerald that is identified by round yellow spots on its thorax and a short abdomen. The face is black. Females may have wings tinted brown. Its abdomen seems to be wider in the middle when compared to other Somatochlora species. The body length varies from 1.7 to 1.9 inches.

Description of Habitat/Range:

Common throughout Canada and northern United States, it is usually found at clear, slow flowing streams in the forests. In Wisconsin, it is common except in the most southern counties.

Flight Season:

Mid-June to late July in Wisconsin. Throughout its range, the flight season is from early June to late September.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
1%
(1)
49%
(34)
45%
(31)
4%
(3)
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 ocellated emerald
Male ocellated emerald. © Dan Jackson

Male ocellated emerald
Photo of Male ocellated emerald
Male ocellated emerald. © Kurt Mead

Male ocellated emerald
Photo of Male appendages of ocellated emerald
Male appendages of ocellated emerald. © Kurt Mead

Male appendages of ocellated emerald
Photo of Female ocellated emerald
Female ocellated emerald. © Ryan Brady

Female ocellated emerald
Photo of Female ocellated emerald
Female ocellated emerald. © Jim Lind

Female ocellated emerald



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