Saturday, May 10, 10 a.m. – The Blue Heron Nature Preserve in Sandy Springs presents Mysterious Mushrooms. The event will include a lecture by mushroom expert Mary Woehrel, information on how to identify edible and poisonous mushrooms, and a guided, mushroom-scouting walk through the preserve. $20 per person. Blue Heron Nature Preserve, 4055 Roswell Rd, Sandy Springs, GA 30342. Register online at www.bhnp.org, by calling to 678-315-0836 during business hours, or by mailing registration forms available on the website with your check to the Blue Heron Nature Preserve.