Wisconsin Odonata Survey

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Epitheca canis  (McLachlan, 1886)
Beaverpond Baskettail


Corduliidae, Emerald Family

The baskettail species that occur in Wisconsin are very similar to each other, requiring in-hand examination to be sure about species identification. They differ primarily in the shape of the terminal appendages and presence or absence of dark markings on the wings. They are medium-sized dragonflies with dark brown bodies and small yellow markings on the sides of the abdomen. There is some disagreement among odonatists as to whether they should be placed in the genus Epitheca or the genus Tetragoneuria.

Status-Global/State:

Global: G5     Wisconsin: S5    

Distinguishing Characteristics:

The black abdomen is constricted just below the base especially in males. The length of the body varies from 1.7 to 1.9 inches. The wings varies in shades from clear to amber-brown, depending on age and gender. For example, the wings of older females are often washed with brown.

Description of Habitat/Range:

This species is commonly found throughout southern Canada and northern United States. It prefers bog ponds, slow streams, and marshy lakes. It is common throughout most of Wisconsin, especially in the north.

Flight Season:

Mid-May to late July in Wisconsin. The flight period is similar to the spiny baskettail's.


Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
28%
(70)
64%
(161)
6%
(16)
<1%
(1)
<1%
(1)
<1%
(1)
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 beaverpond baskettail
Male beaverpond baskettail. © Dan Jackson

Male beaverpond baskettail
Photo of Abdomen tip of a male beaverpond baskettail showing cercus (upper part of clasper) with dog-leg bend near tip
Abdomen tip of a male beaverpond baskettail showing cercus (upper part of clasper) with dog-leg bend near tip. © Ryan Chrouser

Abdomen tip of a male beaverpond baskettail showing cercus (upper part of clasper) with dog-leg bend near tip
Photo of Immature male beaverpond baskettail
Immature male beaverpond baskettail. © Dan Jackson

Immature male beaverpond baskettail
Photo of Female beaverpond baskettail
Female beaverpond baskettail. © Dan Jackson

Female beaverpond baskettail
Photo of Female beaverpond baskettail
Female beaverpond baskettail. © David Hanson

Female beaverpond baskettail



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