Great Blue Skimmer dragonfly (young female)

A Great Blue Skimmer dragonfly (Libellula vibrans) was spotted on 20 May 2015 during a photowalk alongside the wetlands at Huntley Meadows Park (HMP). This individual is a young female, as indicated by its coloration and terminal appendages.

A Great Blue Skimmer dragonfly (Libellula vibrans) spotted at Huntley Meadows Park, Fairfax County, Virginia USA. This individual is an immature female.

20 MAY 2015 | HMP | Great Blue Skimmer (young female)

The young female was sheltering in vegetation close to the ground.

A Great Blue Skimmer dragonfly (Libellula vibrans) spotted at Huntley Meadows Park, Fairfax County, Virginia USA. This individual is an immature female.

20 MAY 2015 | HMP | Great Blue Skimmer (young female)

She was quite skittish, flying to a new location whenever I violated her comfort zone.

A Great Blue Skimmer dragonfly (Libellula vibrans) spotted at Huntley Meadows Park, Fairfax County, Virginia USA. This individual is an immature female.

20 MAY 2015 | HMP | Great Blue Skimmer (young female)

Look closely at the full-size version of the following annotated image. Female Great Blue Skimmers have a pair of flanges beneath their eighth abdominal segment (S8) that are used to scoop water when laying eggs (oviposition), hence the family name “Skimmer.” Remember that all dragonflies and damselflies have a 10-segmented abdomen, numbered from front to back.

A Great Blue Skimmer dragonfly (Libellula vibrans) spotted at Huntley Meadows Park, Fairfax County, Virginia USA. This individual is an immature female.

20 MAY 2015 | HMP | Great Blue Skimmer (young female)

Immature Great Blue Skimmer dragonflies and immature Slaty Skimmer dragonflies (Libellula incesta) — including both females and males — look very similar. In my opinion, the best field marker for differentiating the two species is femur coloration: Great Blue Skimmer femora are mostly tan; Slaty Skimmer femora are mostly black.

The following female Slaty Skimmer was spotted along the “Hike-Bike Trail” at Huntley Meadows Park. Contrast the difference in coloration of the Slaty Skimmer femurs (below) with the Great Blue Skimmer femurs (above).

A Slaty Skimmer dragonfly (Libellula incesta) spotted along the "Hike-Bike Trail" at Huntley Meadows Park, Fairfax County, Virginia USA. This individual is a female.

04 JUN 2012 | HMP | Slaty Skimmer (young female)

Related Resources:

  • Great Blue Skimmers – “The femora are pale over their basal half with the remaining length, tibiae and tarsi black.”
  • Slaty Skimmer – “The legs are black with brown only at their extreme bases.”

Digital Dragonflies: presenting high-resolution digital scans of living dragonflies.

  • Genus Libellula | Libellula vibrans | Great Blue Skimmer | female | top view
  • Genus Libellula | Libellula vibrans | Great Blue Skimmer | female | side view

Digital scans by G & J Strickland:

Copyright © 2015 Walter Sanford. All rights reserved.

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One Response to “Great Blue Skimmer dragonfly (young female)”

  1. Summertime is skimmer time | walter sanford's photoblog Says:

    […] Female Slaty Skimmer dragonflies and female Great Blue Skimmer dragonflies (Libellula vibrans) look similar. The following blog post provides guidance regarding key field markers that can be used to differentiate the two species: Great Blue Skimmer dragonfly (young female). […]

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