Making new friends

Swift Setwing dragonfly (Dythemis velox) was discovered recently at Mulligan Pond, Jackson Miles Abbott Wetland Refuge (JMAWR) — the first official record of Swift Setwing in Fairfax County, Virginia USA.

This is the most widespread of the North American setwings and it is apparently continuing to expand its range. Source Credit: Swift Setwing, Odonata Central Field Guide, Dragonfly Society of the Americas.

The following photographs were taken two days later at the same location.

Male 1

A Swift Setwing dragonfly (Dythemis velox) spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. This individual is a male.

26 JUN 2016 | JMAWR | Swift Setwing (male)

A Swift Setwing dragonfly (Dythemis velox) spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. This individual is a male.

26 JUN 2016 | JMAWR | Swift Setwing (male)

Male 2

A Swift Setwing dragonfly (Dythemis velox) spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. This individual is a male.

26 JUN 2016 | JMAWR | Swift Setwing (male)

(See a full-size version of the original photo, without annotation.)

Male dragonflies have three terminal appendages, collectively called “claspers,” that are used to grab and hold female dragonflies during mating: an upper pair of cerci (“superior appendages”); and a lower unpaired epiproct (“inferior appendage”).

Female

The last individual is a female, as indicated by her terminal appendages. Female dragonflies have a pair of cerci (superior appendages) that have little or no function.

A Swift Setwing dragonfly (Dythemis velox) spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. This individual is a female with a malformed wing.

26 JUN 2016 | JMAWR | Swift Setwing (female)

(See a full-size version of the original photo, without annotation.)

Notice the female has two malformed wings.

A Swift Setwing dragonfly (Dythemis velox) spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. This individual is a female with a malformed wings.

26 JUN 2016 | JMAWR | Swift Setwing (female)

(See a full-size version of the original photo, without annotation.)

Copyright © 2016 Walter Sanford. All rights reserved.

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7 Responses to “Making new friends”

  1. Another new species discovered at JMAWR | walter sanford's photoblog Says:

    […] record of Swift Setwing in Fairfax County, Virginia USA. For more information, see Making new friends by Walter […]

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    […] Making new friends, published on 10 July 2016. […]

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    […] 26 JUN 2016 | JMAWR | Swift Setwing (male) […]

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    […] 26 JUN 2016 | JMAWR | Swift Setwing (male) […]

  5. Swift Setwing dragonflies (males) | walter sanford's photoblog Says:

    […] Wetland Refuge (JMAWR), Fairfax County, Virginia USA. All of the individuals in this gallery are male, as indicated by their terminal […]

  6. Late-season Swift Setwing dragonflies | walter sanford's photoblog Says:

    […] 05 SEP 2017 | JMAWR | Swift Setwing (mature male) […]

  7. Up close and personal | walter sanford's photoblog Says:

    […] at Jackson Miles Abbott Wetland Refuge (JMAWR), Fairfax County, Virginia USA. This individual is a male, as indicated by his terminal […]

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