COUNTYBartramian Audubon Society has birding field trips in northwestern Pennsylvania including Saturday to Buttermilk Hill Sanctuary; and May 14 for the spring migration bird count. Call 724-794-2434 to register. Trips are free.Succop Nature Park, 185 W. Airport Road, Penn Township, hosts free birding and nature hikes with a naturalist at 9 a.m. Thursdays. Call 412-963-6100 or visit www.aswp.org.Jennings Environmental Education Center, Route 528, Brady Township, will host “Spring Wildflowers” at 2 p.m. Sunday; “Homeschool CSI: PA Mammal Atlas” on May 25; “Environment through Conservation” science experience June 20 to 23 for 10th- through 12th-graders; and “DiscoverE: Summer Programs for Kids!” for children 4 to 12. Registration is necessary for school and youth programs. Call 724-794-6011.Moraine State Park, Muddy Creek Township, hosts “Volunteer Clean-up Day” 9 a.m. to noon Saturday from the South Shore office; to register call 724-368-8811. A wildflower hike is planned 10 a.m. to 1 p.m. May 21 from the Route 528 Trailhead, Prospect exit. Also on May 21 from 11 a.m. to 5 p.m. will be the Muddy Creek oil field living history exhibit off the Prospect exit. A family fishing program is planned 9:30 a.m. to noon May 28 at Watts Bay Marina, North Shore (reservations required).

REGIONMcConnells Mill State Park, Slippery Rock Township, Lawrence County off Route 422, has a wildflower walk from 2 to 3:30 p.m. Sunday from Hell’s Hollow. A volunteer work day — Grist Mill cleanup is 9 a.m. to noon May 14. To register call the park office at 724 368-8811.Star parties sponsored by the Amateur Astronomers Association of Pittsburgh is set for 8:30 p.m. May 13 and 14 at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park near Russellton. Call 724-224-2510.