(Silverton, OR)  --  Silver Falls State Park is getting ready to host its annual Mother's Day Birding and Wildflower Festival on May 11th and 12th.  Activities include a wildflower show, a native plant sale, guided bird watching and wildflower walks, educational discovery tables, bird crafts and live raptor presentations.  All activities are free, but there is a five-dollar daily parking permit fee.  All activities happen from 10 a.m. to 4 p.m. in the South Falls Day-use area, unless otherwise indicated in the full schedule on the Oregon State Parks website.