Posts Tagged ‘Accotink Creek’

Blue-fronted Dancers (male, female)

March 22, 2019

Male

A Blue-fronted Dancer damselfly (Argia apicalis) was spotted near Mulligan Pond at Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA.

This individual is a male, as indicated by the pattern of blue coloration on his thorax and abdomen, plus the blue coloration on abdominal segments eight through 10 (S8-10).

25 SEP 2016 | Jackson Miles Abbott WR | Blue-fronted Dancer (male)

Female

Several Blue-fronted Dancers were spotted during a photowalk along Accotink Creek/Great Blue Heron Trail at Accotink Bay Wildlife Refuge (ABWR), Fairfax County, Virginia USA.

The first individual is a female, as indicated by two field marks.

Eyes brown, darker above; lack of blue in eyes in andromorph good distinction from male. Source Credit: Paulson, Dennis (2011-12-19). Dragonflies and Damselflies of the East (Princeton Field Guides) (Kindle Locations 3451-3452). Princeton University Press. Kindle Edition.

Female Blue-fronted Dancers are polymorphicandromorph females are blue like males; heteromorph females are brown-green. Andromorph females tend to be a lighter shade of blue than males of the same species.

This individual is a blue andromorph. Regardless of the color morph…

females never have blue on the last abdominal segments (S8-10). Source Credit: Michael Boatwright, founder and administrator of the Virginia Odonata Facebook group.

02 AUG 2016 | ABWR | Blue-fronted Dancer (female)

More males

Two male Blue-fronted Dancers were spotted at Accotink Bay Wildlife Refuge.

02 AUG 2016 | ABWR | Blue-fronted Dancer (male)

02 AUG 2016 | ABWR | Blue-fronted Dancer (male)

Copyright © 2019 Walter Sanford. All rights reserved.

Bridges

January 20, 2017

As an avid odonate hunter, I photowalk/streamwalk many scenic locations. I’m fond of bridges, especially railroad bridges.

The first photo shows a view of the underside of the new suspension bridge across Accotink Creek at Accotink Bay Wildlife Refuge (ABWR), Fairfax County, Virginia USA.

A scenic view of the underside of the suspension bridge that crosses Accotink Creek at Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA.

07 AUG 2016 | ABWR | new suspension bridge across Accotink Creek

The next photo shows the view looking upstream toward the ruins of a Civil War era railroad bridge that used to cross Pope’s Head Creek at Chapel Road Park, Fairfax County, Virginia USA.

Looking upstream toward the ruins of a Civil War era railroad bridge that used to cross Pope's Head Creek, Chapel Road Park, Fairfax County, Virginia USA.

22 AUG2016 | Chapel Road Park | bridge ruins at Pope’s Head Creek

The last photo shows the view looking downstream toward a modern era railroad bridge across Pope’s Head Creek near Chapel Road Park.

Looking downstream toward modern era railroad bridge that crosses Pope's Head Creek, Chapel Road Park, Fairfax County, Virginia USA.

29 AUG 2016 | Chapel Road Park | railroad bridge at Pope’s Head Creek

Copyright © 2017 Walter Sanford. All rights reserved.

Blue-fronted Dancer damselfly (female)

January 18, 2017

Blue-fronted Dancer damselfly (Argia apicalis) was spotted during a photowalk along Accotink Creek Trail at Accotink Bay Wildlife Refuge (ABWR), Fairfax County, Virginia USA. An old wooden boardwalk is located near the terminus of the trail.

A Blue-fronted Dancer damselfly (Argia apicalis) spotted along Accotink Creek at Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA. This individual is a female.

07 AUG 2016 | ABWR | Blue-fronted Dancer (female andromorph)

This individual is a female andromorph, as indicated by her coloration and terminal appendages. Females have a noticeably thicker abdomen than males.

Female Blue-fronted Dancers are polymorphic: andromorph females are blue like males; heteromorph females are brown. Andromorph females tend to be a lighter shade of blue than males of the same species, and do not feature the same blue coloration as males on abdominal segments eight, nine, and 10 (S8-10).

A Blue-fronted Dancer damselfly (Argia apicalis) spotted along Accotink Creek at Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA. This individual is a female.

07 AUG 2016 | ABWR | Blue-fronted Dancer (female andromorph)

The taxonomic classification of Blue-fronted Dancer is as follows: Order Odonata (Dragonflies and Damselflies); Suborder Zygoptera (Damselflies); Family Coenagrionidae (Narrow-winged Damselflies); Genus Argia (Dancers); Species apicalis.

Related Resources: Excellent digital scans created by Gayle and Jeanelle Strickland. Click on the button labeled “Download file” in order to view full-size version of the graphics.

Editor’s Note: This is the first female Blue-fronted Dancer that I’ve seen/photographed. Thanks to Michael Moore and Ed Lam, members of the Northeast Odonata Facebook group, for verifying my tentative identification. Dr. Michael Moore is an active contributor to the Dragonfly and Damselfly Field Guide and ID App; Ed Lam is author and illustrator of Damselflies of the Northeast.

Copyright © 2017 Walter Sanford. All rights reserved.

New suspension bridge over Accotink Creek

March 28, 2016

Accotink Creek flows through Accotink Bay Wildlife Refuge, a 1,200 acre preserve located at Army Garrison Fort Belvoir, Fairfax County, Virginia USA. The following gallery features a few photos of the new suspension bridge over the stream, taken during a photowalk on 23 March 2016.

The new suspension bridge over Accotink Creek, Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA.

The new bridge, designed and engineered by Western Wood Structures, retains much of the character of the old bridge. The attention to detail is extraordinary!

The new suspension bridge over Accotink Creek, Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA.

Looking ahead (above) and behind (below) along the deck of the new suspension bridge. The deck of the new bridge is rock solid, with none of the discomforting up-down/side-to-side motion of the old bridge!

The new suspension bridge over Accotink Creek, Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA.

Those who know me well know the next photo frustrates me because part of the bridge is clipped on the left edge of the photo. I did everything I could to get the entire bridge span in the frame, including standing in the creek and moving downstream as far as I could without water spilling into my knee-high rubber boots. Although the zoom lens of my Panasonic DMC-FZ150 was set for its maximum wide angle of 4.5mm (25mm, 35mm equivalent), the field of view isn’t wide enough for this shot. Same problem with the Fujifilm X-T1 digital camera and Fujinon XF18-55mm (27mm-82.5mm, 35mm equivalent) zoom lens in my backpack — my Panasonic digital camera is capable of shooting slightly wider angle photos than the Fujifilm camera/lens combo. I’ll bring my Canon EOS 5D Mark II digital camera and 16-35mm wide-angle zoom lens next time I visit the bridge.

The new suspension bridge over Accotink Creek, Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA.

The last photo was taken on 08 May 2014, when the new bridge was under construction. Now you can see the reason I took a one-year (or so) hiatus from visiting Accotink Bay Wildlife Refuge.

The new suspension bridge over Accotink Creek, Accotink Bay Wildlife Refuge, Fairfax County, Virginia USA (under construction).

Related Resources:

Copyright © 2016 Walter Sanford. All rights reserved.

Suspension bridge crossing Accotink Creek

November 9, 2012

The following gallery features several photos of the suspension bridge that crosses Accotink Creek in Accotink Bay Wildlife Refuge, a 1,200 acre preserve located at Army Garrison Fort Belvoir, Fairfax County, Virginia USA. The bridge is quite scenic but the wooden deck moves up and down and side-to-side when you walk across it — VERY UNNERVING!

078-cr2-ver3_aperture

The preceding photo shows Louisa Civilla Craven, my good friend and photowalking buddy, shooting photographs looking upstream from the bridge; the following photo shows the view in the same direction.

077-cr2-ver3_aperture073-cr2-ver3_aperture081-cr2-ver4_aperture

The last photo shows the view downstream from the bridge.

075-cr2-ver2_aperture

Copyright © 2012 Walter Sanford. All rights reserved.


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