Brook Snaketail -- Pennsylvania's First

The Pennsylvania Game Commission recently acquired a large tract of land on the north face of the Kittatinny Ridge in southern Monroe County. This property, once slated for development, contains a variety of habitats including a sedge and alder wetland that borders the Aquashicola Creek. This habitat looked like an excellent place to search for dragonflies, so I headed down there with my net and camera in hopes of finding some interesting species.

Sedges, cattails, and alders (in back)

While walking through the sedges, I found numerous Ashy Clubtails--a very common species this time of year:

The sedges also held many Calico Pennants and Twelve-spotted Skimmers. Once I worked my way through the sedges, I decided to focus my search close to the creek where it would be easier to see and catch the insects. Here I found many more Ashy Clubtails as well as hundreds of Ebony Jewelwings.

male Ebony Jewelwing--a type of damselfly

I soon spotted a large dragonfly with a distinctive green color, unlike the other species I had been seeing. I netted this individual in order to get a closer look:

This green, black, and yellow dragonfly is a Maine Snaketail, a species that inhabits rocky streams. This species is ranked as an S2S3 species within the state by the Pennsylvania Natural Heritage Program, which means that this is a rare species in Pennsylvania.

Not long after catching the Maine Snaketail, I spotted another dragonfly that appeared to be similar. In fact, when I saw it flying, I figured it might be of the same species. However, closer inspection suggested that was not the case.

The general appearance is very similar to that of the Maine Snaketail, but there are few differences in coloration and a distinct terminal appendage shape. Examination of the male's terminal appendages can be extremely helpful when identifying dragonflies. Notice the difference in shape of the appendages between the Maine Snaketail and this individual:

Maine Snaketail--note the two distinct "spines" on the lower appendage

On this snaketail, note the single spike on the lower appendage and the different shape of the upper

When I got home, I was able to research this species and determined it to be a Brook Snaketail (Ophiogomphus aspersus). After consulting a few experts, my identification was confirmed. I also discovered that this is a species that had never been recorded in the state of Pennsylvania before! 

I can't wait to get back to these game lands to see what other species may be hiding there!

Maine Snaketail and other dragons

While attempting to photograph Indian Skippers on the property this afternoon (I did not succeed thanks to the strong wind), I noticed that there were quite a few dragonflies and damselflies out and about. Most of the damsels were bluets in the Northern/Vernal/Boreal species-group, which are not identifiable in the field. Although I was unable to identify them, I enjoyed watching them nervously fly between swaying blades of grass and occasionally perching on a sunny leaf or twig.

The most common dragonflies this afternoon were Common Whitetails, which will likely be the most abundant species throughout the summer months as well. It was slightly tricky to spot other species among the throngs of whitetails, but I managed to spot this Ashy Clubtail thanks to his flight style.

While I was observing the clubtail, he was dive-bombed by a Juvenal's Duskywing, a butterfly that seems to feel no fear when defending its territory against other butterflies, predatory insects, and even people! Although the clubtail disappeared after the incident with the butterfly, the pesky duskywing alerted me to the presence of another dragonfly that was perched just a few feet away:

This gorgeous odonate is a Painted Skimmer, a species that is fairly common this time of year in damp meadows. Its color and pattern is unique and definitely makes it stand out among the duller species! Unfortunately, Painted Skimmers tend to be skittish. I was only able to take a few photographs before he took flight and was out of sight.

Just as I headed back towards the house, I flushed another dragonfly off its perch. It flew different and looked strange compared to the others I had previously seen, so I followed it for a bit until it landed on the tip of a small greenbrier stem.

This gorgeous yellow, green, and black dragonfly is a Maine Snaketail, a new species for the yard. Typically, this species is found along streams, not ridgetop meadows. I can only imagine that this individual was engaging in "hill-topping," a mate-seeking behavior demonstrated by many insect species that often takes them out of their typical habitats. In fact, this is not the first time I have observed this behavior in this same meadow. Last May, I found an Uhler's Sundragon (a relatively rare species) in almost the same place as this year's snaketail.

A less-than-desirable photo of the Uhler's Sundragon I found in 2012

The fact that I found both of these species so far away from their typical stream habitats suggests that naturalists should always keep an open mind and be on the look-out for unexpected species. Who knows what is out there!

A Maine Snaketail that I found in 2011 in a more typical "northern" stream habitat in Sullivan Co., PA (State Game Lands #57)