Botany
- Arkansas flora query
- Cal Flora
- Colorado Flora
- Connecticut Botanical Society
- Digital Flora of Texas
- USDA PLANTS National Database
- Wisconsin Flora
Ecology
- BioQuip Home Page
- BugGuide.Net
- Butterflies and Moths of North America
- CalPhotos
- Chicago Wilderness
- Chicago Wilderness Magazine
- Environmental News and Humor (Grist)
- Illinois Nature Preserves
- Iowa Department of Natural Resources
- Minnesota State Natural Areas
- Missouri Department of Conservation
- Orange County, CA Parks
- Pennsylvania State Natural Areas
- USGS Dragonflies and Damselflies of the United States
- Wisconsin State Natural Areas