Great blue skimmer
Introduction The '''great blue skimmer''' ('''''Libellula vibrans''''') is a dragonfly of the skimmer family. With a total length of , it is one of the largest skimmers. The immature forms of the skimmer are brown in color and mature forms are blue-hued. This species is found near lakes, ponds, and slow streams in the eastern United States and rarely in southern Ontario.
References
External links ***  Libellula vibrans on BugGuide.Net