Posts Tagged ‘Hotspot No. 2’

Hotspot No. 2

October 29, 2018

The Backstory

A small population of Sable Clubtail dragonflies (Stenogomphurus rogersi) was observed along three segments of a tiny stream located in Fairfax County, Virginia USA. I named the segments Hotspot No. 1, Hotspot No. 2, and “Powell’s Place.”

Hotspot No. 1 is the place where I saw my first Sable Clubtail. At least five individuals, all males, were observed by the author at this location. To date, almost all of the photos of Sable that have been published in this blog were taken at Hotspot No. 1.

Hotspot No. 2 is located upstream from Hotspot No. 1, near one of several seeps that feed the creek. This is the location where a female Sable Clubtail was spotted on 05 July 2018. As it turn out, that female was the last Sable spotted during 2018.

Powell’s Place” is located downstream from Hotspot No. 1, where the stream re-emerges from an underground concrete pipe. “Powell’s Place” is named for Mike Powell, my good friend and photowalking buddy, who spotted the first Sable observed at this segment of the stream. A related blog post will be published on Friday, 02 November 2018.

Hotspot No. 2

One or more male Sable Clubtail dragonflies were observed and photographed on 12 June 2018 at this location.

12 JUN 2018 | Fairfax County, VA | Sable Clubtail (male)

12 JUN 2018 | Fairfax County, VA | Sable Clubtail (male)

12 JUN 2018 | Fairfax County, VA | Sable Clubtail (male)

Copyright © 2018 Walter Sanford. All rights reserved.

Sable Clubtail dragonfly (female)

July 16, 2018

A Sable Clubtail dragonfly (Stenogomphurus rogersi) was spotted perched near a small stream located in Fairfax County, Virginia USA. This individual is a female, as indicated by her rounded hind wings and terminal appendages.

Female: Colored like male but a bit more yellow on abdomen, including fine dorsal lines on segments and prominent patches on edges of S8–9. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 6092-6093). Princeton University Press. Kindle Edition.

The first photo is the best shot from a set of “record shots,” that is, quick-and-dirty shots that provide a record of the spotting. As is. This is the first female Sable Clubtail that I have seen.

05 JUL 2018 | Fairfax County, VA | Sable Clubtail (female)

The next photo is my favorite in the set. Notice the tattered wings of this mature female — looks like she’s been working hard to perpetuate the small population of S. rogersi at this location!

05 JUL 2018 | Fairfax County, VA | Sable Clubtail (female)

The last photo provides a dorso-lateral view of the female.

05 JUL 2018 | Fairfax County, VA | Sable Clubtail (female)

New late date for Northern Virginia

The adult flight period for Sable Clubtail is from 08 June to 25 June (peaks in mid-June) according to records for Northern Virginia maintained by Kevin Munroe, former manager at Huntley Meadows Park. 05 July extends the old record by 10 days.

According to records for the Commonwealth of Virginia maintained by Dr. Steve Roble, a zoologist at the Virginia Department of Conservation and Recreation, Division of Natural Heritage, 21 May to 24 July is the adult flight period for S. rogersi.

Reproducing population

There is a small reproducing population of S. rogersi at this location, as evidenced by my spotting of a mature female and Dr. Edward Eder’s observation of a mating pair (in wheel) on 21 June 2018. Great catch, Ed!

Image used with permission from Dr. Edward Eder.

Copyright © 2018 Walter Sanford. All rights reserved.


%d bloggers like this: