Chloropteryx tepperaria - Hodges#7075
(Angle-winged Emerald) ♂.
Size: approx. 15 mm. Photo: 03/11/17, 10 pm.

The Southern US is home to the Angle-winged Emerald and can be found all year round in Florida. The genus has three species in North America. The small photo was taken on 08/07/14 and possibly shows a female. 

bug guide (this photo):