The Natural Heritage of Indiana:  Wildflowers
Indiana Native Plant and Wildflower Society (INPAWS)
Amos Butler Audubon Society  and   Lights Out Indy
Indiana Bluebird Society
National Wildlife Refuges: Indiana
Indiana Wildlife Federation:  Wildlife-Friendly Habitats
DNR:  Help Indiana's Wildlife
State Wildlife Action Plans

Land Conservation
Central Indiana Land Trust          
The Nature Conservancy of Indiana
DNR:  Division of Nature Preserves

General
Earth Day Indiana
Environment and Nature
Geocaching

Bird, bat and animal cams from around the country
Owl nest cam, Fort Waye (Wild Birds Unlimited)
Cornell Lab of Ornithology
Washington Dept. of Fish and Wildlife