- Dendrology (tree identification) at Virginia Tech
- AmphibiaWeb
- Species 2000
- Butterflies and Moths of North America, including the Children’s Butterfly Site
- Web Images of North American Moth Species by John Snyder
- The National Biological Information Infrastructure (NBII) web site
- Odonata Central site for Dragonflies and Damselflies of North America
- eNature.com a site for information about the wild animals and plants of the United States.
- All About Birds from the Cornell Lab of Ornithology.
- Thomas Schoepke Plant Image Gallery
