Wisconsin Odonata Survey

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Enallagma hageni  (Walsh, 1863)
Hagen's Bluet


Coenagrionidae, Pond Damsel Family

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: S5    

Distinguishing Characteristics:

The males of this species can exhibit either blue-type or intermediate-type amounts of blue on the abdomen. It is very similar to the marsh bluet, differing by the shape of the terminal appendages. The bluet's length varies from 1.1 to 1.3 inches. The male has a blue thorax with black dorsal and shoulder stripes. The female's thorax is similar but the pale areas are light brown to bluish or green. Her abdomen is black dorsally.

Description of Habitat/Range:

Found throughout northern United States and southern Canada, Hagen's bluet is usually found in ponds, marshes, open bogs, lakeshores, and slow streams. It is tolerant of acidic waters. It is common and widespread throughout Wisconsin.

Flight Season:

Early June to early September in Wisconsin.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
2%
(10)
34%
(176)
52%
(268)
11%
(55)
1%
(6)
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 Hagen's bluet
Male Hagen's bluet. © Dan Jackson

Male Hagen's bluet
Photo of Male Hagen's bluet
Male Hagen's bluet. © Dan Jackson

Male Hagen's bluet
Photo of Male Hagen's bluet
Male Hagen's bluet. © Mike Reese

Male Hagen's bluet
Photo of Abdomen tip in side view of male Hagen's bluet
Abdomen tip in side view of male Hagen's bluet. © Willson Gaul

Abdomen tip in side view of male Hagen's bluet
Photo of Female Hagen's bluet
Female Hagen's bluet. © Dan Jackson

Female Hagen's bluet
Photo of Female green form Hagen's bluet
Female green form Hagen's bluet. © Dan Jackson

Female green form Hagen's bluet
Photo of Immature female Hagen's bluet
Immature female Hagen's bluet. © Dan Jackson

Immature female Hagen's bluet
Photo of Hagen's bluet pair
Hagen's bluet pair. © Dan Jackson

Hagen's bluet pair



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