Posts Tagged ‘Bull Run’

New discoveries in 2017 (odonates)

December 28, 2017

There’s always more to discover/learn! My odonate-related new discoveries in 2017 are presented in reverse-chronological order.

Fine-lined Emerald dragonfly

A Fine-lined Emerald dragonfly (Somatochlora filosa) was spotted at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA. This individual is one of several males spotted during a period of a week-or-so in mid-September 2017.

Immature male Calico Pennant

20 JUN 2017 | OBNWR | Calico Pennant (immature male)

A Calico Pennant dragonfly (Celithemis elisa) was spotted at Painted Turtle Pond, Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA. This individual is an immature male. Notice its coloration is similar to female Calico Pennants.

Allegheny River Cruiser dragonfly

An Allegheny River Cruiser (Macromia alleghaniensis) was netted by Mike Blust at Hardware River Wildlife Management Area, Fluvanna County, Virginia USA. This individual is a male.

Harpoon Clubtail dragonfly

09 JUN 2017 | Highland County, VA | Harpoon Clubtail (male)

A Harpoon Clubtail dragonfly (Phanogomphus descriptus) was spotted at “Straight Fork,” Highland County, Virginia USA. This individual is a male. Sincere thanks to fellow Virginians Karen Kearney and Mike Boatwright for guiding me to this unique high-elevation habitat.

It’s worth noting that I saw two more new species during the same trip: Riffle Snaketail (Ophiogomphus carolus); and Dot-tailed Whiteface (Leucorrhinia intacta).

Those who know me well are familiar with one of many “Walterisms”: “I haven’t ‘seen’ something until I have photographed it.” My rationale is two-fold: 1) A photograph verifies a sighting. 2) The detail visible in a good photograph exceeds the acuity of the human eye. Suffice it to say I saw two other species but haven’t seen them. Makes sense to me!

Swift River Cruiser dragonfly

A Swift River Cruiser dragonfly (Macromia illinoiensis) was spotted at Riverbend Park, Fairfax County, Virginia USA. This individual is an emergent/teneral female.

Spine-crowned Clubtail dragonfly

A Spine-crowned Clubtail dragonfly (Hylogomphus abbreviatus) spotted along Bull Run at Hemlock Overlook Regional Park, Fairfax County, Virginia USA. This individual is a male. A female was spotted on the same day at a nearby location.

Epitheca cynosura exuvia

A Common Baskettail dragonfly (Epitheca cynosura) exuvia was collected at Painted Turtle Pond, Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

Epitheca princeps exuvia

05 MAR 2017 | Prince Baskettail (Epitheca princeps) | exuvia (face-head)

A Prince Baskettail dragonfly (Epitheca princeps) exuvia was collected from an unknown location. This specimen was on temporary loan from Huntley Meadows Park, Fairfax County, Virginia USA.

Copyright © 2017 Walter Sanford. All rights reserved.

Advertisements

Lentic and lotic

October 3, 2017

Doesn’t this idyllic place look like ideal habitat for lotic species of odonates? It is!

Lotic refers to flowing water, from the Latin lotus, washed. … Lotic ecosystems can be contrasted with lentic ecosystems, which involve relatively still terrestrial waters such as lakes and ponds. Source Credit: River ecosystem, Wikipedia.

The preceding photo shows the stream crossing at Popes Head Creek, Hemlock Overlook Regional Park, Fairfax County, Virginia USA (facing downstream toward Bull Run). Both streams provide ideal habitat for many species of dragonflies and damselflies that prefer flowing water rather than still water.

Tech Tip: I used my Panasonic Lumix DMC-FZ150 superzoom camera to shoot the landscape photo featured in this blog post. The camera was set for manual focus at the hyperfocal distance for an aperture of f/4, based upon the instructions provided in the excellent video tutorial by Graham Houghton, “Panasonic Lumix FZ camera easier manual focus method — super point-and-shoot tip.”

Copyright © 2017 Walter Sanford. All rights reserved.

Blue-fronted Dancer (male, female)

August 18, 2017

Many Blue-fronted Dancer damselflies (Argia apicalis) were spotted along Bull Run, Hemlock Overlook Regional Park, Fairfax County, Virginia USA.

Male

The first individual is a male, as indicated by his terminal appendages.

21 JUN 2017 | Fairfax County, VA | Blue-fronted Dancer (male)

There is a blue morph female Blue-fronted Dancer, therefore the male’s blue coloration is insufficient to identify its gender.

21 JUN 2017 | Fairfax County, VA | Blue-fronted Dancer (male)

Female

Female Blue-fronted Dancers are polymorphic, including a blue andromorph and a brown heteromorph, shown below. Thanks to Ken Larsen, member of the Virginia Odonata Facebook group, for help in identifying this individual.

21 JUN 2017 | Fairfax County, VA | Blue-fronted Dancer (heteromorph female)

Related Resources:

Copyright © 2017 Walter Sanford. All rights reserved.

American Rubyspot damselfly (female)

July 27, 2017

An American Rubyspot damselfly (Hetaerina americana) was spotted during a photowalk along Bull Run in Fairfax County, Virginia USA. As far as I know, this is the first official record for American Rubyspot at this location.

This individual is a female, as indicated by her terminal appendages and ovipositor.

21 JUN 2017 | Fairfax County, VA | American Rubyspot (female)

Notice one of the damselfly’s wings is either malformed or injured. She was able to fly, although it seemed to be a struggle.

The Backstory

The damselfly landed on my thigh a few minutes before the preceding photograph was taken. It was like she was pleading with me to help her, although I admit I tend to project my thoughts onto the odonates I photograph. I would have tried to unfold her wing, but I never had an opportunity. Two teenage girls and a bear-sized dog startled me! (I never heard/saw them approaching. The girls told me their dog is a Long Hair German Shepherd.) When I flinched the damselfly flew to the perch shown above, just beyond my reach.

Copyright © 2017 Walter Sanford. All rights reserved.

Black-shouldered Spinyleg (males)

July 11, 2017

Several Black-shouldered Spinyleg dragonflies (Dromogomphus spinosus) were spotted recently in Fairfax County, Virginia USA. All of these individuals are male, as indicated by their terminal appendages and “indented” hind wings.

Male 1

Male 1 and 2 were observed along a mid-size rocky stream. It’s possible the photos show the same male observed at different times, although several Black-shouldered Spinyleg have been seen at this location.

26 JUN 2017 | Fairfax County, VA | Black-shouldered Spinyleg (male)

Male 2

26 JUN 2017 | Fairfax County, VA | Black-shouldered Spinyleg (male)

It seems like all of the male Black-shouldered Spinyleg at this location are very skittish — they flew away almost every time I waded slowly into the stream for a closer shot!

26 JUN 2017 | Fairfax County, VA | Black-shouldered Spinyleg (male)

Male 3

The last male was spotted perching on a large boulder, overlooking Bull Run.

26 JUN 2017 | Fairfax County, VA | Black-shouldered Spinyleg (male)

The water was too deep on three sides of the rock to allow me to photograph the dragonfly from multiple angles, so I made the most of the only view that was available.

26 JUN 2017 | Fairfax County, VA | Black-shouldered Spinyleg (male)

Copyright © 2017 Walter Sanford. All rights reserved.


%d bloggers like this: