Bartramian Audubon Society's wildlife sanctuaries will be the site of expert-led field trips to see habitats, vegetation and wildlife. The trip on Saturday will be to the Robert A. Macoskey Center for Sustainable Systems of Slippery Rock University on Harmony Road. Trips are free and residents may participate in any or all of them. Trips start at 8:30 a.m. Contact Gene Wilhelm at 724-794-2434 or genewilhelm@aol.com.

Moraine State Park will show how a historic oil well operates on Park Road from 10 a.m. to 4 p.m. Sept. 14 and Oct. 12. Call 724-368-8811.

A September Star Party sponsored by the Amateur Astronomers Association of Pittsburgh is set for 7:30 p.m. Sept. 14, weather permitting, at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park near Russellton. Call 724-224-2510.McConnells Mill State Park in Slippery Rock Township, Lawrence County, hosts “A Taste of History: Dutch Oven Cooking” from noon to 3:30 p.m. Sept. 15 in the gristmill courtyard. The heritage festival will be from 11 a.m. to 6 p.m. Sept. 28 and 29. The mill is open from 11 a.m. to 4 p.m. Fridays, Saturdays and Sundays. Tours, which last about 45 minutes, are available at 1 and 3 p.m. Call 724 368-3612.