Saturday, May 11. Spring's Wings Migratory Bird Festival. There are many activities for people of all ages: Bird house/feeder building, wild songbird banding demonstration (UW-Green Bay), birds of prey programs, birding hikes, and many booths featuring Green Bay Duck Hunters, NEW Audubon, Bird City, etc. Bay Beach Wildlife Sanctuary, 1660 East Shore Drive, Green Bay. Free and open to the public.