03 Jul 2014.
Tyler State Park, Bucks Co, PA.
Found in a swamp.
ID confirmed by John & Jane Balaban:
ID confirmed by photo - shows diagnostic triple (not double) row of cells beyond forewing triangle
First record for the park.
Second record for the park. First record was a blurry photograph taken at same location by members of Guelph University Bio-bus team on July 5th at same location, possibly of same individual.
The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in the world. It is sometimes considered to contain the Corduliidae as the subfamily Corduliinae and the Macromiidae as the subfamily Macromiinae. Even if these are excluded (as Silsby does), there still remains a family of over 1000 species. With nearly worldwide distribution, these are almost certainly the most often seen of all dragonflies.