Common Whitetail Dragonfly (Plathemis lydia)
Common Whitetail Dragonfly (Plathemis lydia)
Common Whitetail Dragonfly (Plathemis lydia)
Common Whitetail Dragonfly (Plathemis lydia)
Common Whitetail Dragonfly (Plathemis lydia)
Common whitetail dragonflies sitting on logs along the banks of the Mississippi River in Des Moines County, Iowa. The male whitetail is shown in the top two images, female in the bottom two.

Details:

(Top & 2nd image)  Canon EOS 10D,  shutter 1/125 second, aperture f13, ISO 400, Canon EF 100 mm macro lens.

(3rd image)  Canon EOS 10D,  shutter 1/350 second, aperture f13, ISO 400, Canon EF 100 mm macro lens.

(Bottom)   Canon EOS 10D,  shutter 1/180 second, aperture f11, ISO 200, Canon EF 100 mm macro lens, Canon MR-14EX flash.
 

Selected References:

Milne Lorus, Milne Margery. National Audubon Society Field Guide to Insects & Spiders. New York: Alfred A. Knopf, Inc., 1980.  Plate 347, P 378.