Tree Identification Program, 1 to 3 p.m. toda, Beaver Park Lone Pine Lodge, Lisbon. Free. Enjoy a fall walk at Beaver Park while learning to identify trees and shrubs. Expect to walk at least 1 to 11/2 miles. Hot drinks and refreshments will be available at the lodge after the walk. Please register by Sept. 15 by calling Beaver Park at 353-9075 or emailing [email protected] This event is scheduled rain or shine.

“Best Nature Sites of Midcoast Maine,” authors Tony Oppersdorff and Kyrill Schabert will give a slide show presentation on their book at 6:30 p.m. Tuesday, Lithgow Public Library, 45 Winthrop St., Augusta. FMI: Call 626-2415 or go to www.lithgow.lib.me.us.

Sportsmen’s Forum, with Chandler Woodcock, commissioner of the Maine Department of Inland Fisheries and Wildlife, begins with potluck supper at 6:30 p.m. Wednesday, hosted by the Norway-Paris Fish & Game Club, Buckfield Road, South Paris. Woodcock will talk about his role in the department’s efforts and answer questions about hunting, fishing and outdoors-related topics. The public is invited to participate in the free event. FMI: Visit www.npfg.org.

Hunter Safety Course, Monmouth Fish & Game. 6 p.m. to 8:30 p.m. Tuesday and Thursday; noon to 5 p.m. Saturday; 6 to 8:30 p.m. Sept. 27 and 29. $10. If you’ve never had a Maine hunting license or haven’t had one since 1976, you must pass this course before you can buy a hunting license. Students ages 10-12 must be accompanied by an adult. Class is limited to 40 students. Attendance at all sessions is required. Pre-register by calling Doug Beck at 215-9639 and leaving a message. The club will provide mid-afternoon refreshments Saturday.

Acadia Night Sky Festival, Bar Harbor, Thursday through Sept. 26, a community celebration to promote the protection and enjoyment of Down East’s stellar night sky as a valuable natural resource through education, science and the arts. For more information, including a list of activities, please visit AcadiaNightSkyFestival.com.

Saco Bay Chapter of Ducks Unlimited annual dinner and auction, 5:30 p.m. Friday, Dunegrass Country Club, Old Orchard Beach. Rebekah LaCourse, Maine’s winning 2011 Duck Stamp artist, will speak and has donated artwork to the auction. Proceeds go to conservation programs. $50 for a single, $75 per couple, $35 for a Greenwing (16 and under), $275 for a Bronze Sponsor, $300 for a sponsor couple and $550 for a corporate table. To buy tickets or to learn more, call Craig Evans at 934-2052.

Wild About Whitetails, 10 a.m. to 2 p.m. Saturday, Maine Wildlife Park, Route 26, Gray. Celebrate National Hunting & Fishing Day and learn about deer from Maine Department of Inland Fisheries & Wildlife biologists and presenters, including taxidermist Dana Soucier, who will mount a trophy buck from start to finish. The park is open from 9:30 a.m. to 4:30 p.m. daily through Nov. 11; visitors must leave the park by 6 p.m. Admission is $7 for adults, $5 for seniors, $5 for ages 5-12 and free for ages 3 and under. FMI: Call 657-4977 or visit www.mainewildlifepark.com.

Mid-Coast Audubon Birdseed Sale, orders must be received by Oct. 20, but order this week if possible to help lock in prices, by emailing [email protected] or calling 380-1370. FMI: Visit www.midcoastaudubon.org.

Looking Ahead

Kennebec River paddle, with the Vassalboro Conservation Commission, from Seven Mile Stream to Augusta, 10 a.m. to 3 p.m. Oct. 1. All are invited to explore this beautiful section of the river. Bring a canoe or kayak, or team up with someone else. Shuttling available. To register or for more information, go to www.vassalboro.net.

Community Bike Ride in Yarmouth to celebrate Livestrong Day and raise awareness of people living with cancer. 10 a.m. Oct. 1. Check in at the Log Cabin, 196 Main St., starting at 9:30 a.m. All riding abilities welcome. Cyclists may choose from 12- or 23-mile rides and are encouraged to wear yellow. There is no registration fee, but donations to the Lance Armstrong Foundation are encouraged. Refreshments will be served after the ride. Please register in advance by emailing [email protected] com or call Maura at 841-3327 or Deb at 846-0955.

Beach Raid, 5K race on Gooch’s and Mother’s Beaches in Kennebunk, 9 a.m. Oct. 1. Participants will charge through natural and manmade obstacles and boot camp-style exercise stations. After the event, Federal Jack’s Restaurant & Brew Pub will host a party for participants and their friends and family. $30. To register, go to www.beachraid.com.

Star Gazing Party, Oct. 1, Great Pond Mountain Wildlands in Orland as part of the statewide Maine Starlight Festival. The South Gate on Route 1 (south of the Route 176 intersection) will open starting at 7 p.m. Bring blanket or light chair, warm clothing, binoculars, telescopes or other astronomical gear. Telescopes will be available. There will be no rain/cloud date. Check for weather cancellations at www.greatpondtrust.org, email [email protected] or call 469-2008.

Fall Open House, Hidden Valley Nature Center, Jefferson. Oct. 2. Come and learn about fly fishing, including creating flies, and test you r skills in Little Dyer Pond. No previous experience is required and all equipment and materials will be provided. There will be other activities for kids and families, including music, forestry games and a nature walk. For more information, call 586-6752 or visit www.hvnc.org.

Ongoing

Guided trail walks at Inland Woods/Pine Ridge trails in Waterville. 8 a.m. Mondays through October. Free; all welcome. Meet at trailhead behind Inland Hospital, 200 Kennedy Memorial Drive. FMI: www.kmtrails.org or 861-3292.

Discovery Trek series, Portland Trails. Guided walks are free to Portland Trails members; $5 suggested donation for nonmembers. Register by emailing [email protected] or calling 775-2411. For more information, go to www.trails.org.

The Kennebec Land Trust Outing Club offers events for active adults age 21 and older. Excursions are free for trust members or $5 for nonmembers. For a schedule, go to www.tklt.org. Call 377-2848 or email Theresa Kerchner at [email protected] to register.

Weekly Bird Walk, 7 a.m. Thursdays at Gilsland Farm, off Route 1, Falmouth; $5 for Maine Audubon members, $8 for nonmembers. Bring binoculars and a field guide and meet in the visitor center parking lot. FMI: Call 781-2330, ext. 209.

Casco Bay Bicycle Club hosts several weekly road bike rides in the Portland area, and special one-time rides, often with an opportunity to socialize after. Members and nonmembers are welcome. FMI: Go to www.cascobaybicycleclub.org.