The Audubon Society of Western Pennsylvania hosts naturalist led walks at 9 a.m. Thursdays at the Succop Conservancy, 185 Airport Road, Penn Township. Call 412-963-6100 or visit www.aswp.org to register.

Jennings Environmental Education Center, Route 528, Brady Township, is accepting registration through May 3 for “Eating Green, Eating Wild!” set for 1 to 4 p.m. May 11. The program is designed for people age 16 and older. Space is limited. Register at www.dcnr.state.pa.us/Calendar/list.asp or 724-794-6011.

McConnells Mill State Park in Slippery Rock Township, will be the site of a Spring Wildflower Walk from 1 to 3 p.m. April 27 leaving from Hells Hollow. The historic gristmill opens May 18. Admission and parking are free. Call 724-368-8811.A Star Party will start, weather permitting, at 8 p.m. Friday and Saturday at Wagman Observatory in Deer Lakes Regional Park, Frazer Township, near the village of Russellton in northeastern Allegheny County. Admission is free, though donations are accepted to help cover the costs of operation. Call 724-224-2510.