Friendly Help from Tim
There are only 2 species represented. All but
two of the images are of Argia vivida, the Vivid
Dancer. The brown and white/gray ones are females or
young males (in some of the images, the sex cannot be
determined) and the blue/violet ones are males (or
blue females). The second and third images on the
third row of images at your site (the two "pink/red"
ones) appear to be of the Desert Firetail, Telebasis
salva. Hope this helps.
Tim Manolis
"Dragonflies and Damselflies of
California."