Wisconsin Odonata Survey

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Enallagma divagans  Selys, 1876
Turquoise Bluet


Coenagrionidae, Pond Damsel Family
Possible Species

The bluets form a group of about 17 similar species in Wisconsin in which the males usually share the characteristics of having blue and black stripes on the thorax, and blue and black markings on the abdomen. In-hand examinations are usually needed to identify them, although they can be grouped into subcategories based on the amount of black showing on the abdomen. Males are easily identified, under magnification, by the shape of their terminal appendages. Females are generally duller than males, and they are more difficult to identify, which is accomplished by subtle differences in the shape of the mesostigmal plates on the top of the thorax. Generally, males are bright blue while the females are green or yellow-green or blue. There are some species that are yellow-orange, a mix of various colors, or black with some blue.

Status-Global/State:

Global: G5     Wisconsin: SQ    

Distinguishing Characteristics:

The male of this species is black-type bluet because of its largely black abdomen. The male's blue thorax has a broad black mid-dorsal and thin black shoulder stripes. The abdomen is mostly black above except for the blue just before the black tip. The female is similar but with pale areas dull blue, and the abdomen with a black dorsal spot on a blue tip. The body length of a turquoise bluet varies from 1.1 to 1.4 inches. The male is similar to the stream bluet male but with no blue rings on the abdomen.

Description of Habitat/Range:

Ranging throughout eastern United States, this species can be found at slow parts of streams, sloughs, well-vegetated ponds and lakes. Although there is a historical record from Douglas County, it may be based on a misidentification. Because of the current knowledge about its range, we think it is unlikely that this species occurs in Wisconsin.

Flight Season:

The flight period, throughout its range, may be from late May to late July.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
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 turquoise bluet
Male turquoise bluet. © Dennis Paulson

Male turquoise bluet
Photo of Female turquoise bluet
Female turquoise bluet. © Dennis Paulson

Female turquoise bluet



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