Posts Tagged ‘pruinescence’

Slaty Skimmer dragonfly (male, No. 2)

September 2, 2020

The following photo shows a Slaty Skimmer dragonfly (Libellula incesta) that was spotted during a photowalk with Michael Powell near Mulligan Pond at Jackson Miles Abbott Wetland Refuge (JMAWR) in Fairfax County, Virginia USA.

This individual is a mature male, as indicated by his coloration and terminal appendages.

18 AUG 2020 | JMAWR | Slaty Skimmer (male)

This mature male has mated many times, as indicated by the scratches on his abdomen.

Males that have mated often have marks on their abdomen where the female legs have scratched them. This is especially obvious in species in which males develop pruinosity, as the pruinosity on the mid-abdomen is scratched off, and the signs are visible at some distance. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 390-392). Princeton University Press. Kindle Edition.

Copyright © 2020 Walter Sanford. All rights reserved.

Great Blue Skimmer (mature male)

August 28, 2020

A Great Blue Skimmer dragonfly (Libellula vibrans) was spotted during a photowalk with Michael Powell around Mulligan Pond at Jackson Miles Abbott Wetland Refuge (JMAWR) in Fairfax County, Virginia USA.

This individual is a mature male, as indicated by his slightly tattered wings, blue coloration, and terminal appendages.

18 AUG 2020 | JMAWR | Great Blue Skimmer (mature male)

This male has mated many times, as indicated by the scratches on his abdomen.

Males that have mated often have marks on their abdomen where the female legs have scratched them. This is especially obvious in species in which males develop pruinosity, as the pruinosity on the mid-abdomen is scratched off, and the signs are visible at some distance. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 390-392). Princeton University Press. Kindle Edition.

Tech Tips

The preceding photo is full-frame (4,000 x 3,000 pixels), that is, uncropped.

The Panasonic Lumix DMC-FZ300 is one of two superzoom bridge cameras that I use as my “go to” rigs for photowalking. The minimum focusing distance in AF Macro mode is 1 m (3.3 feet) at maximum telephoto (600 mm, 35mm equivalent). My usual practice is to set the camera lens for maximum telephoto and move as close as possible to the minimum focusing distance, resulting in maximum magnification of the subject. That’s how I shot the photo shown above.

It’s worth noting the minimum focusing distance is 2 m (6.6 feet) at maximum telephoto when the camera IS NOT set for AF Macro mode. If your goal is to get as close as possible to the subject in order to fill the photo frame, then AF Macro mode is the way to go.

Copyright © 2020 Walter Sanford. All rights reserved.

Blue-faced Meadowhawk (young male)

November 8, 2019

A Blue-faced Meadowhawk dragonfly (Sympetrum ambiguum) was spotted near a vernal pool in the forest at Huntley Meadows Park, Fairfax County, Virginia USA.

This individual is a young male, as indicated by the red pruinescence that partially covers his yellow-orange and black abdomen, plus his terminal appendages.

20 SEP 2013 | HMP | Blue-faced Meadowhawk (young male)

Regular readers of my photoblog know I’m fond of head-tilts in which the dragonfly seems to display some of its personality, especially when the individual is looking at me (below).

20 SEP 2013 | HMP | Blue-faced Meadowhawk (young male)

Left, right, left. I followed this guy from perch to perch for several minutes.

20 SEP 2013 | HMP | Blue-faced Meadowhawk (young male)

The Backstory

My collection of field notes includes two text files that list lots of photos of both Blue-faced Meadowhawk and Autumn Meadowhawk dragonflies (S. vicinum) that were never published in my photoblog. Most of the photos were taken during Fall 2013 when one of many vernal pools at Huntley Meadows Park was near peak diversity for odonate species that inhabited the pool. Sadly, those days are long gone!

Copyright © 2019 Walter Sanford. All rights reserved.

Widow Skimmer dragonfly (mature male)

August 23, 2019

A Widow Skimmer dragonfly (Libellula luctuosa) was spotted at Painted Turtle Pond, Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

16 AUG 2019 | Occoquan Bay NWR | Widow Skimmer (mature male)

This individual is a mature male, as indicated by the white pruinescence on his thorax and abdomen, pattern of wing spots (contrast with female pattern of wing spots), and terminal appendages.

This male has mated many times, as indicated by the scratch marks on his abdomen.

Males that have mated often have marks on their abdomen where the female legs have scratched them. This is especially obvious in species in which males develop pruinosity, as the pruinosity on the mid-abdomen is scratched off, and the signs are visible at some distance. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 390-392). Princeton University Press. Kindle Edition.

Copyright © 2019 Walter Sanford. All rights reserved.

Common Whitetail (mature male)

August 21, 2019

Common Whitetail dragonfly (Plathemis lydia) was spotted near the Painted Turtle Pond Environmental Study AreaOccoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

This individual is a mature male, as indicated by the white coloration of his abdomen, pattern of wing spots, and terminal appendages. He is perched vertically on the corner of a storage shed.

16 AUG 2019 | Occoquan Bay NWR | Common Whitetail (mature male)

This male has mated many times, as indicated by the scratch marks on his abdomen.

Males that have mated often have marks on their abdomen where the female legs have scratched them. This is especially obvious in species in which males develop pruinosity, as the pruinosity on the mid-abdomen is scratched off, and the signs are visible at some distance. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 390-392). Princeton University Press. Kindle Edition.

Gear Talk

“Expose for the highlights” is a well-known rule of thumb in photography, that is, adjust the camera settings so the highlights are exposed perfectly.

Mature male Common Whitetail dragonflies are challenging to photograph because they prefer perching in direct sunlight, so it’s easy to blow out the highlights on their bright white abdomen. After a few test shots, I was able to adjust the flash power ratio so that the subject is exposed properly.

Copyright © 2019 Walter Sanford. All rights reserved.

Golden Boy

July 5, 2019

A Needham’s Skimmer dragonfly (Libellula needhami) was spotted at Occoquan Regional Park (ORP), Fairfax County, Virginia USA.

This individual is an immature male, as indicated by his coloration and terminal appendages. The yellowish-red coloration of this specimen could mislead you into thinking it’s a female. Be aware that the same species of dragonfly may appear differently depending upon gender, age, and natural variation.

At this stage in the male’s maturation, his coloration is similar to females of the same species. As a mature male, the front of his thorax and abdomen will be covered by red pruinescence.

Related Resource: Posts Tagged ‘Needham’s Skimmer dragonfly’

Copyright © 2019 Walter Sanford. All rights reserved.

Great Blue Skimmer dragonfly (mature male)

April 12, 2019

Great Blue Skimmer dragonfly (Libellula vibrans) was spotted near a vernal pool in the forest at Huntley Meadows Park (HMP), Fairfax County, Virginia USA. This individual is a mature male, as indicated by his terminal appendages, discolored abdomen, and tattered wings.

This male has mated many times, as indicated by the scratches on his abdomen.

Males that have mated often have marks on their abdomen where the female legs have scratched them. This is especially obvious in species in which males develop pruinosity, as the pruinosity on the mid-abdomen is scratched off, and the signs are visible at some distance. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 390-392). Princeton University Press. Kindle Edition.

Copyright © 2019 Walter Sanford. All rights reserved.

Widow Skimmer dragonfly (immature male)

July 4, 2018

A Widow Skimmer dragonfly (Libellula luctuosa) was spotted during a photowalk at Occoquan Regional Park, Fairfax County, Virginia USA.

This individual is an immature male, as indicated by its coloration and terminal appendages. As a mature male, the front of his thorax and abdomen will be covered by white pruinescence.

Copyright © 2018 Walter Sanford. All rights reserved.

Survivors

May 25, 2018

The adult flight period for Blue Corporal dragonfly (Ladona deplanata) is from March 09 to July 09, according to records for the Commonwealth of Virginia maintained by Dr. Steve Roble; records for Northern Virginia maintained by Kevin Munroe show the flight period is from the second week in April to the first week in June. In my experience, the third week in May is late for Blue Corporal.

Meadowood Recreation Area

A single Blue Corporal dragonfly was spotted perched on the dock at Hidden Pond, Meadowood Recreation Area (MRA), Fairfax County, Virginia USA. This individual is a mature male, as indicated by his terminal appendages and dark blue pruinescence covering the body.

21 MAY 2018 | MRA | Blue Corporal (mature male)

Contrast the appearance of a mature male Blue Corporal with teneral males of the same species spotted on 26 April 2018 at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

21 MAY 2018 | MRA | Blue Corporal (mature male)

Prince William Forest Park

Two days later, another mature male Blue Corporal was spotted perched on the railing of an observation platform at a small pond located in Prince William Forest Park, Prince William County, Virginia USA.

23 MAY 2018 | MRA | Blue Corporal (mature male)

Editor’s Notes: Dr. Steve Roble is a zoologist at the Virginia Department of Conservation and Recreation, Division of Natural Heritage. Kevin Munroe is the former manager of Huntley Meadows Park, Fairfax County, Virginia.

Copyright © 2018 Walter Sanford. All rights reserved.

Blue Corporal (teneral males)

May 3, 2018

Several teneral male Blue Corporal dragonflies (Ladona deplanata) were spotted near Painted Turtle Pond during a photowalk at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

Teneral/immature/young male Blue Corporals look similar to females of the same species. Terminal appendages can be used to differentiate gender: males have three (3) appendages; females have two (2).

Some of the ground cover is charred from a recent controlled burn at Occoquan Bay NWR.

The common name for Blue Corporal is derived from two cream-colored stripes that appear on the front of the thorax, similar to the two stripes that signify the rank of corporal in the military. As a mature male, those stripes will be partially obscured by dark blue pruinescence.

Related Resource: Blue Corporal (teneral females).

Copyright © 2018 Walter Sanford. All rights reserved.


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