Arigomphus pallidus (Gray-green Clubtail) ♂.
Photo: 04/08/17, 2 pm.

The Gray-green Clubtail is found primarily in Florida, Georgia, and South Carolina and prefers sandy-bottomed streams, ponds, and lakes. It perches on the ground or low growing plants. It is not very colorful but the bright green eyes can be very distinctive. 
bug guide (this photo):
Giff Beaton: