Backyard Wildlife Habitat Program from the National Wildlife Federation. Learn what you can do to encourage wildlife in your own yard. 

National Arbor Day Foundation Helping people plant and care for trees.

The Morton Arboretum The goal of the Arboretum is to encourage the planting and conservation of trees and other plants for a greener, healthier and more beautiful world.

Chicago Botanic Gardens Owned by the Forest Preserve District of Cook County, the Garden is a place of ever-changing natural beauty that you can stroll through daily

Possibility Place Nursery specializing in natural landscaping materials

Pizzo & Associates Native Plants and Seeds for Ecological Gardening. Prairie, Woodland and Wetland Restoration. Serving the Midwest.

Chicago Wilderness Magazine many publications available on-line.

The Wild Ones Journal promotes biodiversity and environmentally sound practices.

The Tallgrass Prairie in Illinois resource for native plants. 

If you have a great link to add to this list-email here.