Here are a pair of downloadable posters (this is a large-format, 2-page pdf) assembled by Otter Vispo providing a bit of information and an image for almost all of the species which we have recorded from the County.
Here's a basic dragonfly slideshow (in pdf format), it profiles some of the odonates associated with different Columbia County habitats.
We're planning to add a guide to our local dragons and damsels based on the above poster; in the meantime, those interested in dull details can check-out our county list.
Dragonflies and Damselflies of the East by Dennis Paulson.
The Dragonflies and Damselflies of Algonquin Provincial Park and the Surrounding Area by Colin Jones, Andrea Kingsley, Peter Burke and Matt Holder.
Damselflies of the Northeast by Ed Lam.
A Field Guide to the Dragonflies and Damselflies of Massachusetts by Blair Nikula, Jennifer Loose, and Matthew Burne
Distribution and Status of the Odonates of New York by Erin White, Jeff Corser, and Matt Schlesinger.