Archive for the ‘Panasonic DMC-FZ150’ Category

American Lady butterfly

February 20, 2018

An American Lady butterfly (Vanessa virginiensis) was spotted during a photowalk at Meadowood Recreation Area, Fairfax County, Virginia USA.

This butterfly looks similar to several species with which I’m familiar but isn’t a perfect match, so I consulted the experts on the BugGuide Facebook group. Sincere thanks to Matt Pelikan, Jack Blackford, and Ken Childs for help in identifying the butterfly.

Copyright © 2018 Walter Sanford. All rights reserved.

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What is it?

February 18, 2018

It’s time for another exciting edition of “What is it?” Well, what is shown in the following photograph?

What is shown in this photograph?

If you were thinking “empty containers of Philadelphia cream cheese spread,” then you’re only half right.

These small plastic tubs can be repurposed as storage containers for odonate exuviae, such as the Sable Clubtail dragonfly (Stenogomphurus rogersi) exuvia shown below. (Oops, I just noticed it’s time to update the label on the container!)

Storage container for a Sable Clubtail dragonfly (exuvia).

The containers are ideal in many ways. They’re not too big and not too small. The tubs can be “nested” so they don’t take up much space when you’re in the field. For long-term storage, the closed containers can be stacked neatly inside a larger box such as a Rubbermaid Keeper. And the tubs can be used to soak specimens in soapy water in order to clean- and/or re-pose exuviae when they’re pliable.

Finally, think about all the tasty toasted bagels and cream cheese that you get to eat in order to build a collection of specimen containers — that’s what I call a win-win situation!

Copyright © 2018 Walter Sanford. All rights reserved.

Long-jawed Orb Weavers

February 10, 2018

Long-jawed Orb Weavers (Family Tetragnathidae) are commonly spotted at Mulligan Pond, Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA.

02 AUG 2017 | JMAWR | Long-jawed Orb Weaver

The common name is due to the extended length of the chelicerae (jaws) compared to those of other orb weavers (Araneidae). Source Credit: Family Tetragnathidae – Long-jawed Orb Weavers, BugGuide.

05 SEP 2017 | JMAWR | Long-jawed Orb Weaver

Related Resources

Copyright © 2018 Walter Sanford. All rights reserved.

Predator and prey

February 8, 2018

A Black and Yellow Argiope (Argiope aurantia) was spotted during a photowalk along Deephole Point Road at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA. A female Common Whitetail dragonfly (Plathemis lydia) is trapped in the spider web.

“Eat or be eaten” is perhaps the most fundamental law of nature. Predator-prey relationships can change suddenly: one minute a predator, such as a dragonfly, is hunting for its next meal; next minute the dragonfly becomes the prey and is a meal for another predator, such as a spider, elsewhere in the food web.

Copyright © 2018 Walter Sanford. All rights reserved.

Male Blue-faced Meadowhawk dragonflies

February 4, 2018

On the same day that I saw a male Blue-faced Meadowhawk dragonfly (Sympetrum ambiguum) with an eye injury, one or more other males were photographed at the same location in Huntley Meadows Park, Fairfax County, Virginia USA.

22 OCT 2017 | HMP | Blue-faced Meadowhawk (male)

Please look at the full-size version of each photo in order to fully appreciate these handsome little devils!

22 OCT 2017 | HMP | Blue-faced Meadowhawk (male)

22 OCT 2017 | HMP | Blue-faced Meadowhawk (male)

22 OCT 2017 | HMP | Blue-faced Meadowhawk (male)

22 OCT 2017 | HMP | Blue-faced Meadowhawk (male)

Copyright © 2018 Walter Sanford. All rights reserved.

Familiar Bluet damselfly (female)

February 2, 2018

A Familiar Bluet damselfly (Enallagma civile) was spotted near a drainage ditch at a remote location in Huntley Meadows Park, Fairfax County, Virginia USA. This individual is a female.

The damselfly appears to be eating a smaller black insect, possibly a spider.

Editor’s Note: Sincere thanks to Mike Boatwright for verifying my tentative identification of the damselfly.

Copyright © 2018 Walter Sanford. All rights reserved.

Legend of the Woolly Bear caterpillar

January 29, 2018

A “Woolly Bear caterpillar” was spotted during a photowalk at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

Wooly Bear caterpillar is the larval form of the Isabella Tiger Moth (Pyrrharctia isabella).

According to legend, …

The Woolly Bear caterpillar has 13 distinct segments of either rusty brown or black. The wider the rusty brown sections (or the more brown segments there are), the milder the coming winter will be. The more black there is, the more severe the winter. Source Credit: WOOLLY BEAR CATERPILLARS AND WEATHER PREDICTION – USING WOOLLY WORMS FOR A WINTER FORECAST, The Old Farmer’s Almanac.

Is the legend scientifically valid?

…this myth has been around since, you know, the colonial times. But in 1948, this curator of entomology from the American Museum of Natural History, Dr. Howard Curran, he did a little study. He went out to Bear Mountain, New York, and he counted the woolly bears, the bands – the brown bands of the woolly bear there. And he counted about 15 different specimens, and he made a prediction. Source Credit: The Myth of the Woolly Bear, National Public Radio.

Problem is, a sample size of 15 is insufficient for making meaningful conclusions. So looking at one caterpillar, as I did, is completely meaningless. Nonetheless, I always think of the legend whenever I see a Woolly Bear and wonder what it tells me about the upcoming winter.

Related Rescources

Copyright © 2018 Walter Sanford. All rights reserved.

Slaty lady

January 27, 2018

Mike Powell and I were searching for Fine-lined Emerald dragonflies at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA. As we were walking along one of many gravel trails at the park, I spotted a dragonfly perching atop an unusually tall grass stem.

16 SEP 2017 | Occoquan Bay NWR | Slaty Skimmer (mature female)

This individual is a mature female Slaty Skimmer dragonfly (Libellula incesta). Although Mike and I were disappointed we hadn’t found a Fine-lined Emerald, I was happy to shoot a photograph worthy of my Odonart Portfolio.

Related Resources

Copyright © 2018 Walter Sanford. All rights reserved.

Red-spotted Purple butterflies

January 25, 2018

A Red-spotted Purple butterfly (Limenitis arthemis astyanax) was spotted during a photowalk along Deephole Point Road at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

About a week later, another Red-spotted Purple was spotted during a walk around Mulligan Pond at Jackson Miles Abbott Wetland Refuge, Fairfax County, Virginia USA.

The appearance of Red-spotted Purple seems to be somewhat variable.

Copyright © 2018 Walter Sanford. All rights reserved.

Question Mark

January 23, 2018

A Question Mark butterfly (Polygonia interrogationis) was spotted during a photowalk at Occoquan Bay National Wildlife Refuge, Prince William County, Virginia USA.

Two field marks can be used to identify this butterfly. First, notice the row of four dark spots on the dorsal side of its forewings (highlighted in an animated GIF by Deb Platt).

Second, notice the silver-white question mark shape on the ventral side of its hind wings (highlighted in an animated GIF by Deb Platt).

Related Resources

Copyright © 2018 Walter Sanford. All rights reserved.


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