BROWNTOWN - The Green Rock Audubon Society will host a Spring Bird Walk on Saturday, May 18 at the Cadiz Springs State Recreation Area. The Bird Walk is free, however, the purchase of a daily or annual admission sticker for each vehicle is required to enter the park. Participants who wish to carpool to the park can meet at 8 a.m. Saturday at the Monroe Public Library, 925 16th Ave. John Patterson, a local bird enthusiast, will lead the walk.