Dragonflies come in many colors - Houston area wetlands

Little blue dragonflies out in force in George Bush Park after heavy rains (11/1/2013 pic)

This dragonfly  is special, featuring two colors: green and blue. Monochromatic ones are more common.
Spotted in Bear Creek Pioneers Park, which is currently partially flooded as a result of heavy rains in the watershed, is heavily frequented by dragonflies (and ibises).

The pics below show a variety of dragonflies, in different colors, that are common in the West Houston area.