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 for the “Scout Stewards: Battling Invasive Species” for individual scouts or troops/packs/groups of no more than 10 through 3 p.m. Friday. Registration closes May 3 for a program on “Eating Green, Eating Wild!” planned for 1 to 4 p.m. May 11. The program is designed for those 16 and older. Space is limited. Register at www.dcnr.state.pa.us/Calendar/list.asp or 724-794-6011.

A star party will start, weather permitting, at 8 p.m. April 19 and 20 at Wagman Observatory in Deer Lakes Regional Park, near Russellton in Allegheny County. Admission is free. Donations are accepted. Call 724-224-2510.