I easily spotted the small patch of Turk’s cap lilies as I finished my hike on a trail in Shenandoah National Park. The morning sun perfectly highlighted them against the forest green background. Since they stood high above other plants along the trail, I knew I could get a good shot of these nature wildflowers.
I took a few photos when this female Eastern Tiger Swallowtail butterfly suddenly attacked the flowers, flitting from one to the other. It was a very pleasant surprise. The beautiful butterfly moved around so much that it was difficult to get a good angle. As I snapped the last shot, which was this one, the butterfly fluttered off out of sight.
First the disclaimer. I am not a scientist or a lepidopterologist. That’s a person who studies butterflies and moths for a living. (Yes, I had to look it up.)
Now for the background on my Photo of the Week, “When One Became Two.” A couple of decades ago, scientists noticed irregularities in Eastern Tiger Swallowtail butterflies, especially those flitting around the Appalachian Mountains. Their investigations showed that some of the swallowtails were bigger than others. Those that were larger were also paler in yellow pigment than the smaller ones. Enough evidence was presented that it was decided that the giant-sized swallowtail was actually a new species. Thus, the Appalachian Tiger Swallowtail was born. And yes, I realized I am oversimplifying the process and intense research.
I was ignorant of all of this information until I came upon the two different swallowtails side by side, feasting on the same thistle blooms. My wife and I were showing friends from Ontario, Canada, around Rockingham County, Virginia, recently when we saw the two butterflies. Even from our vehicle 30 feet away, we could distinguish that there was a significant size difference between the two tiger swallowtails. We also noticed that the larger one was not as yellow as the smaller one.
The journalist in me went to work after we bid our friends farewell. I was fortunate enough to capture the two butterflies in the same digital frame, which made it easier to compare their sizes and colors. As you can see, the Appalachian Tiger Swallowtail is indeed larger and paler than the more common Eastern Tiger Swallowtail. A check of multiple sources verified my conclusions based on these two main distinctions. Also, the only alteration that I made to the photo was to add my watermark.
So a few years ago the Appalachian Tiger Swallowtail butterfly was designated as a different species than the Eastern Tiger Swallowtail. My Photo of the Week, “When One Becomes Two,” shows why.
The Big Meadows area of Shenandoah National Park is a big, wide-open prairie-like saddle tucked between the park’s hardwood forests. It’s about midway along the Skyline Drive in Shenandoah N.P. According to a park ranger, no one is certain why the meadow is even there. No matter. It is, and the wildlife loves it.
In the summer, Big Meadows is especially a haven for songbirds and insects. Bright and fragrant wildflowers serve as food and habitat for the beautiful butterflies. These thistle blooms were a magnet for this pair of Silver-spotted Skippers and this female Eastern Tiger Swallowtail.
My lovely wife grows beautiful flowers. One of the side benefits of that is the flowers attract a variety of insects. I enjoy checking the flower gardens frequently, never knowing what I’ll find.
On one such foray, I spotted this incredible female Eastern Tiger Swallowtail butterfly flitting from coneflower to coneflower. Backlit by the morning sun, the colors radiated on this fresh, young butterfly.