Most of the time, you can tell adult dragonflies and damselflies apart by the way they hold their wings when landed. Dragonflies hold them perpendicular to their body (head, thorax, abdomen); Damselflies, parallel. As always, there are exceptions to this rule of wing; but the examples below fit the pattern.
|Photo by Marty Horowitz 4/10/2015|
|Photo by Ned Harris 3/29/2015|
Blue-ringed Dancer (I think. But definitely a damselfly!)
|Photo by Marty Horowitz 4/8/2015|
Gray Sanddragon - click on the photo to see (through) the wings.
|Photo by Ned Harris 4/11/2015|
American Rubyspot, both females