Lake County Audubon Society
- Chapter of National Audubon serving Lake County. Site includes information about programs and field trips.
- http://www.lakecountyaudubon.org/

Illinois Audubon Society
- An independent conservation organization founded in 1897. Site includes events calendar, backyard nature section, educational resources, profiles of several common bird species, and information about sanctuaries and local chapters.
- http://www.illinoisaudubon.org/

Chicago Audubon Society
- Serves the Chicago area. Site includes conservation news, calendar of events, newsletter archives, and a rare bird alert.
- http://www.chicagoaudubon.org/

Lake-Cook Audubon Society
- Chapter of the Illinois Audubon Society based in Highland Park, Lake County. Information on bird walks and programs.
- http://www.lakecookaudubon.org/

Champaign County Audubon Society
- Newsletter, field trips, events, and local birding areas.
- http://www.champaigncountyaudubon.org/

Prairie Woods Audubon Society
- Based in Arlington Heights, serves northwest Cook County. Meetings, field trips, educational programs, and newsletters.
- http://prairiewoodsaudubon.org/

Thorn Creek Audubon
- Serves south Cook County and all of Will County.
- http://www.thorncreekaudubon.org/

Decatur Audubon Society
- Meetings, activities, educational opportunities, and newsletter articles.
- http://www.decatur-audubon.org/