Vesper Bluet (Enallagma vesperum) or Alkali Bluet (Enallagma clausum) ?
The insect family Coenagrionidae is found in the order Odonata and the suborder Zygoptera. The Zygoptera are the damselflies, which although less known than the dragonflies, are no less common. There are more than 1,100 species in this family, making it the largest damselfly family. Coenagrionidae has six subfamilies and they are Agriocnemidinae, Argiinae, Coenagrioninae, Ischnurinae, Leptobasinae, and Pseudagrioninae.