Karner Blue Butterfly Walk. 1 to 2:30 p.m. Don’t miss this chance to join Albany Pine Bush Preserve staff on a 0.9-mile hike to see the Karner blue butterfly. Come learn about the natural history of the Karner blue and our efforts to rescue this species from the brink of extinction. Ages 6+. Albany Pine Bush Discovery Center, 195 New Karner Road, Albany. $3 per person/$5 per family. Registration required. 518-456-0655 or visit www.AlbanyPineBush.org/events.