Posts Tagged ‘Phanogomphus exilis’

Ashy Clubtail dragonfly (male)

May 28, 2021

An Ashy Clubtail dragonfly (Phanogomphus lividus) was spotted during a photowalk with Michael Powell along a mid-size stream at an undisclosed location in Prince William County, Virginia USA.

13 MAY 2021 | Prince William County, VA | Ashy Clubtail (male)

This individual is a male, as indicated by his terminal appendages. A dorsal view of the same species shows the hind wings of Ashy males are “indented.” The male was perched on rocks, sand, and leaf litter deposited along the edges of the stream channel.

13 MAY 2021 | Prince William County, VA | Ashy Clubtail (male)

I’ve seen Ashy Clubtail dragonflies many times, but this was the first time I noticed their unusual flight pattern. Imagine a one-car roller coaster, going up and down smoothly while moving forward slowly. That’s the best way I can describe what I saw. You’ll recognize it when you see it — very distinctive!

My buddy Michael Boatwright, founder and administrator of the Virginia Odonata Facebook group, told me Lancet Clubtail (Phanogomphus exilis) has the same flight pattern.

Tech Tips

Both photos are full-frame (4,000 x 3,000 pixels), that is, uncropped. I considered cropping the photos to make the dragonfly appear larger. I decided to post the uncropped photos to show the smallish size of Ashy Clubtail more authentically. Click on each photo in order to see a full-size version that you can zoom-in on to see more detail.

Copyright © 2021 Walter Sanford. All rights reserved.

Flashback to late-May 2019

September 16, 2019

Look closely at the following photo — there’s a dragonfly in there somewhere!

21 May 2019 | PNC. William County, VA | Lancet Clubtail (female)

A Lancet Clubtail dragonfly (Phanogomphus exilis) was spotted by Gary Myers at an undisclosed location in Prince William County, Virginia USA. The dragonfly is perched on leaf litter in a seepage area upstream from a small pond.

Female and male terminal appendages

This individual is a female, as indicated by her rounded hind wings and terminal appendages. (Notice the “bonus bug” to the right of the label for cercus.)

21 May 2019 | PNC. William County, VA | Lancet Clubtail (female)

Contrast the appearance of those female field marks with males of the same species.

03 MAY 2017 | Fairfax County, VA | Lancet Clubtail (male)

Related Resource: Odonate Terminal Appendages — single-topic field guides for dragonflies and damselflies featuring both text and annotated photos.

Copyright © 2019 Walter Sanford. All rights reserved.

Lancet Clubtail dragonfly (male)

June 25, 2017

A Lancet Clubtail dragonfly (Phanogomphus exilis) was spotted during a photowalk at “Straight Fork Beaver Ponds,” Highland County, Virginia USA. This individual is a male, as indicated by his terminal appendages and “indented” hind wings.

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

This male Lancet Clubtail was spotted at the same location as a male Harpoon Clubtail dragonfly (Phanogomphus descriptus) featured in a previous post. Lancet Clubtail is a relatively widespread species of odonate, in contrast with Harpoon Clubtail.

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

Bonus Bug

Look closely at the preceding photo. Did you notice the exuvia from another type of aquatic insect, possibly either mayfly or stonefly? I didn’t see the exuvia when I shot the photo, and missed them again when I post-processed the image. Sometimes I get so focused on the subject that I don’t see the bigger picture.

Tech Tips

The photos were taken using a Fujifilm X-T1 digital camera, Fujinon 55-200mm zoom lens, and Fujifilm EF-X500 shoe mount flash.

Copyright © 2017 Walter Sanford. All rights reserved.

Lancet Clubtail dragonflies (males)

May 14, 2017

At least two Lancet Clubtail dragonflies (Phanogomphus exilis) were spotted during a photowalk along a mid-size stream in Fairfax County, Virginia USA.

03 MAY 2017 | Fairfax County, VA | Lancet Clubtail (male)

These individuals are males, as indicated by their terminal appendages and indented hind wings.

03 MAY 2017 | Fairfax County, VA | Lancet Clubtail (male)

The next photograph was taken at a later time than the first two photos. All of the photos in this post were taken near the same location. Is this another male, or the same one featured in the preceding photos? Who knows?

03 MAY 2017 | Fairfax County, VA | Lancet Clubtail (male)

Lancet Clubtail versus Ashy Clubtail

Lancet Clubtail looks similar to Ashy Clubtail (Phanogomphus lividus). The only way to differentiate the two species with certainty is to examine their external reproductive anatomy; this is impossible unless the specimens are captured and examined in-hand.

Relative size is used sometimes to identify the two species: Lancet Clubtail is slightly smaller than Ashy Clubtail. There are two problems with this method of identification. First, it is virtually impossible to determine the exact size of a specimen in the field unless it is captured and measured. Second, some natural variation in size should be expected among individuals of the same species.

A quick-and-dirty method for differentiating Lancet- and Ashy Clubtails with some degree of certainty is to look at the markings on abdominal segments eight and nine (S8-9). Lancet Clubtail has a “spearpoint” on top of abdominal segment eight (S8) that almost reaches the end of the segment, a wide yellow stripe on top of segment nine (S9), and irregular yellow markings on the sides of segments eight and nine (S8-9).

03 MAY 2017 | Fairfax County, VA | Lancet Clubtail (male)

(See a full-size version of the original photo, without annotation and inset photo of Ashy Clubtail.)

In contrast, Ashy Clubtail has a spearpoint on top of abdominal segment eight (S8) that is less than half the length of the segment, segment nine (S9) may or may not have a pale yellow stripe on top, and the sides of segments eight and nine (S8-9) may or may not have “poorly defined” yellow markings.

03 MAY 2017 | Fairfax County, VA | Ashy Clubtail (male)

(See a full-size version of the original photo, without annotation.)

Coloration is variable among individuals of the same species, so looking at abdominal markings isn’t always a reliable method of identification. In this case, it works beautifully.

Editor’s Note: The word “spearpoint” and the phrase “poorly defined” are descriptors attributed to Dennis Paulson, Dragonflies and Damselflies of the East (Princeton Field Guides). Princeton University Press. Kindle Edition.

Copyright © 2017 Walter Sanford. All rights reserved.

Phanogomphus

April 20, 2017

Two teneral dragonflies were observed near Mulligan Pond during a photowalk at Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA. I was able to photograph the first one I spotted; the second flew away as soon as I approached it.

This dragonfly is either Ashy Clubtail (Phanogomphus lividus) or Lancet Clubtail (Phanogomphus exilis). Based upon the short, faded yellow markings on the dorsal side of abdominal segments eight and nine (S8-9), this individual is probably an Ashy Clubtail dragonfly. Less reliably, the 18 April date of the spotting also suggests Ashy Clubtail (for Northern Virginia).

18 APR 2017 | JMAWR | Ashy Clubtail or Lancet Clubtail (female)

Both Ashy- and Lancet Clubtail dragonflies were formerly classified as members of the genus Gomphus. Both species were reclassified recently as Phanogomphus. In the world of taxonomic classification, there are “lumpers” and “splitters.” Score one for the splitters!

Notice the first photo shows the wings folded above the abdomen. I spotted the teneral dragonfly when it flew toward me from the pond shoreline. The dragonfly rested in this location for a few minutes before it flew to a new spot (shown below) where it perched briefly with its wings unfolded. The last time I saw the dragonfly, it was flying toward the forest alongside the pond.

The other teneral dragonfly that I saw — “the one that got away” — was perched on the lawn near the walking path around the lake; it flew toward the forest when I moved closer to take some photographs.

18 APR 2017 | JMAWR | Ashy Clubtail or Lancet Clubtail (female)

(See a full-size version of the original photo, without annotation.)

This specimen is a female, as indicated by her rounded hind wings and terminal appendages.

All female dragonflies have two cerci (superior appendages); in contrast all male dragonflies have two cerci and one epiproct (inferior appendage), collectively called “claspers.” Contrast the appearance of the terminal appendages of this female Ashy Clubtail with a male of the same species.

The last photo in the set is a wider view that shows how well-camouflaged the dragonfly was perched on the lawn around the pond.

18 APR 2017 | JMAWR | Ashy Clubtail or Lancet Clubtail (female)

The Backstory

I was surprised to discover a Lancet Clubtail dragonfly near Mulligan Pond during late-June 2016. Knowing that Ashy Clubtails can be found in the same habitats preferred by Lancet Clubtails, I decided to look for Ashy Clubtails at Jackson Miles Abbott Wetland Refuge beginning in mid-April 2017. Apparently Mulligan Pond is a good place for both species, because I spotted two Ashy Clubtails the first time I went looking for them. Ah, if only odonate hunting were always so easy!

Post Update

As far as I know, this is the first record for this species at this location. A new record for Ashy Clubtail (Phanogomphus lividus) at Jackson Miles Abbott Wetland Refuge was submitted to the Odonata Central records database on 22 April 2017.

Copyright © 2017 Walter Sanford. All rights reserved.

Advanced Dragonfly Studies

November 26, 2014

During June 2014, I attended an adult class and field trip offered by the Audubon Naturalist Society called “Advanced Dragonfly Studies: Common Darners, Spiketails, Cruisers, and Clubtails of the Mid-Atlantic.” The class instructor was Richard Orr, renowned expert on odonates of the mid-Atlantic region of the United States. The field trip to the Patuxent Research Refuge was led by Mr. Orr and Stephanie Mason, Senior Naturalist, Audubon Naturalist Society.

As I was writing a recent blog post entitled Year in Review: New finds in 2014 (odonates), I decided against including odonates spotted during during the ANS field trip. My rationale was simple: I didn’t find most of the specimens. 42 species of odonates were observed in one day, including many new species for my “life list.” I was able to photograph only a few of the odonates seen by the group due to the fast pace of the advanced class.

Widow Skimmer dragonfly

While waiting for all participants to arrive for the field trip, Bonnie Ott spotted a Widow Skimmer dragonfly (Libellula luctuosa) perching in a flower bed beside the North Tract Visitor Contact Station. This individual is an immature male, as indicated by its coloration and terminal appendages.

Widow Skimmer dragonfly (immature male)

Elegant Spreadwing damselfly

An Elegant Spreadwing damselfly (Lestes inaequalis) was netted at Rieve’s Pond. This individual is a female, as indicated by its coloration. Notice the ovipositor visible on the underside of its abdomen, near the tip. “Usually not very common,” according to Dennis Paulson, author of Dragonflies and Damselflies of the East. [New species for my “life list.”]

Elegant Spreadwing damselfly (female)

Double-ringed Pennant dragonfly

A Double-ringed Pennant dragonfly (Celithemis verna) was spotted at New Marsh. This individual is an immature male, as indicated by its coloration and terminal appendages. [New species for my “life list.”]

Double-ringed Pennant dragonfly (immature male)

Another Double-ringed Pennant was spotted at Sundew Bog in the Central Tract. This individual is a mature male. Stephanie Mason is shown in the background, referring to Stokes Beginner’s Guide to DragonfliesEditor’s Note: “The Central Tract of the refuge is closed to public visitation due to the sensitive nature of much of the scientific work.” Source Credit: Patuxent Research Refuge brochure.

Double-ringed Pennant dragonfly (mature male)

Elfin Skimmer dragonfly

Tiny Elfin Skimmer dragonflies (Nannothemis bella) can be found at Sundew Bog. This individual is either a female or immature male, based upon its coloration. [New species for my “life list.”]

Elfin Skimmer dragonfly (Nannothemis bella)

Bar-winged Skimmer dragonfly

A Bar-winged Skimmer dragonfly (Libellula axilena) was netted at Sundew Bog. This individual is a male, as indicated by its coloration and terminal appendages.

Bar-winged Skimmer dragonfly (male)

Golden-winged Skimmer dragonfly

A Golden-winged Skimmer dragonfly (Libellula auripennis) was netted at Sundew Bog. This individual is a male, as indicated by its coloration and terminal appendages. Golden-winged Skimmer dragonflies and Needham’s Skimmer dragonflies (Libellula needhami) are similar in appearance. [New species for my “life list.”]

Golden-winged Skimmer dragonfly (male)

The distinguished gentleman holding the dragonfly is Peter Munroe, Kevin Munroe’s father. Kevin is the manager of Huntley Meadows Park.

Golden-winged Skimmer dragonfly (male)

Clubtail dragonfly

The following specimen, spotted at Sundew Bog, is either an Ashy Clubtail (Phanogomphus lividus) or Lancet Clubtail (Phanogomphus exilis) dragonfly. Ashy- and Lancet Clubtail dragonflies are similar in appearance and difficult to differentiate with complete certainty. Both species were spotted at this location. This individual is a female, as indicated by its terminal appendages and the rounded shape of its hind wings (near the abdomen).

Clubtail dragonfly (female)

Emerging Common Sanddragon dragonflies

The last stop on the field trip was a walk/wade in the Little Patuxent River, southeast of Bailey Bridge, where we spotted several Common Sanddragon dragonflies (Progomphus obscurus), including a few individuals metamorphosing from larvae to adults. [New species for my “life list.”]

Tech Tips: All of the preceding photos were taken using a Panasonic LUMIX DMC-ZS7 digital camera. The camera is no longer available. The ZS7 was one of the first digital cameras that featured GPS geotagging. Good idea; bad implementation. After extensive field-testing, I discovered the ZS7’s built-in GPS didn’t work as well as Apple iPhone’s “A-GPS” for geotagging photos, and stopped using the camera. I decided to bring the camera with me on the field trip because it’s small, lightweight, and relatively inexpensive in contrast with several other digital cameras I own. Turns out “lightweight” is the operative word. After a long hiatus, I’d forgotten how poorly the camera performs — regrettably, the photos featured in this post are an unpleasant reminder!

Copyright © 2014 Walter Sanford. All rights reserved.


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