Succop Nature Park, 185 W. Airport Road, Penn Township, will host “Birds and More” nature walks at 9 a.m. Thursdays. A “Night Hike for Adults” will be held at 8:30 p.m. May 11. Call 412-963-6100 or visit www.aswp.org.

Buffalo Creek Nature Center, 154 Monroe Road, Sarver, will have a “Night Hike for Adults” at 8:30 p.m. May 11. Call 412-963-6100 or visit www.aswp.org.

Jennings Environmental Education Center, Route 528, Brady Township, will have a “Wildflower Walk” at 2 p.m. May 12. Call 724-794-6011

Moraine State Park will host a “Spring Wildflowers Bike Ride” at 1 p.m. Saturday from Lakeview Beach on the North Shore. To register, call 724-368-8811. A “Wildflower Evening Hike” will take place at 6:30 p.m. May 9 from the McDanel's Launch on the North Shore.

McConnells Mill State Park in Slippery Rock Township, Lawrence County off Route 422, will host a “Spring Wildflower Walk” at 1 p.m. Saturday from the Point parking area. A gristmill greeter volunteer training day is set for 9 a.m. May 18.Star parties, sponsored by the Amateur Astronomers Association of Pittsburgh, will begin about 8:30 p.m. May 17 and 18, weather permitting, at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park near Russellton, Allegheny County. Call 724-224-2510.