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Make checks payable to, and mail to: Illinois Audubon Society, P.O. Box 2547, Springfield, IL 62708.
Single membership $35; family membership $40. Members receive the following publications: Illinois Audubon, Cardinal News, and Fort Dearborn Newsletter. Fort Dearborn has 10 evening meetings a year, and averages more than 15 field trips and/or workshops a year.