Ischnura verticalis, the eastern forktail, is a small damselfly that is extremely common in this area. When you see one, it might just look like a green dot followed by a blue dot slowly moving through the grasses.
Though small, the males are spectacularly beautiful. So are the females for that matter, although they look quite different. In the photo below, the male is above and a young female is below.
They move with ease in and out of the weeds. Although they are small, they are well worth a second look.