1 Hess bird walk
Volunteer leaders Rosanne Becker and Russ Smith will lead a lunchtime bird walk through a small urban park; bring your binoculars and field guide or you can borrow some: noon-1:30 p.m. Monday; Adriana Hess Wetland Park, 2917 Morrison Road W., University Place. Free. tahomaaudubon.org.
2 Miller film ticket sales
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Discounted ticket sales begin for this fall’s Warren Miller Film Festival; screenings include two shows Nov. 14 at the Washington Center for the Performing Arts in Olympia and two shows Nov. 15 at the Pantages Theater in Tacoma. Discounted tickets are $4 off and available to REI members only. Offer good through Sept. 21. rei.com.
3 Blackpowder trail cleanup
Volunteers are needed to help the Capitol City Rifle & Pistol Club with a cleanup work party along its blackpowder trail; 9 a.m.-2 p.m. Saturday. The club is at 14318 Littlerock Road SW, Littlerock; ccrpclub.org/Calendars2014.html.
4 Celestial collisions
The next Tacoma Astronomical Society public night will feature a showing of “Cosmic Collisions”; there will be night-sky viewing through telescopes after if the weather allows, 9 p.m.-midnight, Saturday; Rainier Building, Pierce College Fort Steilacoom campus, Lakewood. tas-online.org.