Photographs, mating behavior, species lists, information about collecting and preserving dragonflies, a glossary of terms, and range maps of western US dragonflies from the University of Puget Sound. www.ups.edu/biology/museum/UPSdragonflies.html
Includes sections on the Specialist Group for Systematic and Phylogenetic Odonatology, journal Petalura, phylogenetic classification, alphabetical checklist, photo galleries, and resources for odonatologists. www.bechly.de
Promotes the study and conservation of dragonflies and damselflies and their natural habitats, especially in the United Kingdom. Includes images and an annotated checklist of British and Irish Odonata. www.dragonflysoc.org.uk
A volunteer effort to document and catalog the Odonata that occur in the state of Michigan. Includes checklists for Michigan, a key to larvae, and a key to Michigan Sympetrum (meadowhawks), bibliographies, and photographs. insects.ummz.lsa.umich.edu/MICHODO/MOS.html