(BG) Fragile Forktail Damselfly (Ischnura posita)
4/19/2006 Battery Park, Old New Castle, DE
This is tiny, as you can see by comparing it to the sunflower seed.
http://bugguide.net/node/view/610575
Could it be that the Eastern has two solid lines on the back of its thorax and the Fragile looks like it has two exclamation marks?
"Yes - Those are some of the salient field marks. The exclamation marks are distinctive if seen, though a very small number of aberrant Easterns can show this. Male Eastern Forktails have abdominal segments 8 and 9 near the tip of the abdomen pale blue with black lateral markings. Fragile lacks blue markings on the end of the abdomen."