Numbers
400 North American species
(1)
3 suborders: Anisoptera (Dragonflies), Zygoptera (Damselflies), Anisozygoptera (only in Asia)
(2)Identification
For some of the very best images, photographs in the field and annotated scans that are an incredible resource for identification, go to the Strickland's site
herePrint References
Borror & White, pp. 68-75
(1)
Internet References
Odonata of North America--checklist, University of Puget Sound. See
discussion on use of this as an authority for taxonomy, common names
A list of the species in the extreme NE can be found here. Go to the home page. URL below, click onMDDS 2005 Final Report and scroll to Table 2. Lists 142 spp. in NH, 158 spp, in ME, 131 spp. in NB. Lots of other info.
Strickland's Site, fantastic annotated scans for identification:
here