FRIDAY

Owl Prowl, 7 p.m., Boothbay Harbor

Bundle up and listen to the owls on this hike at Penny Lake Preserve. During the one-mile walk through field and forest, the group will attempt to call in owls while learning more about their habitat. The event, sponsored by the Boothbay Region Land Trust, is free and best suited for adults and older children. The trail is uneven and rocky. Snowshoes or ice traction devices would be best. Penny Lake Preserve is located off Route 27. Turn between the Boothbay Harbor Chamber of Commerce and the Flagship Inn, and proceed down past the Carousel Theater to the parking area. To learn more, email [email protected] or call 633-4818.

Twilight Walk, 6 p.m., Biddeford

The Eastern Trail Alliance is hosting a twilight walk on the section of the trail in Biddeford. Meet at the rear of the Southern Maine Health Care parking lot. Leave your electronics behind for awhile and join others for a walk under the winter sky. No flashlights or pets. To learn more email [email protected] or call 283-4487.

SATURDAY

Whiskeag Trail Outing, 1 p.m., Bath

Bath Trails invites kids, adults and families to explore the Whiskeag Trail on Nordic skis and snowshoes. Meet at McMann Athletic Fields, near the intersection of Congress Avenue and Aegis Drive. Chuck Mainville of the Maine Youth Sports Opportunities, a Nordic skiing program for local families, will be on hand to lead the cross-country skiers. The athletic fields and nearby paths sport gentle slopes and a variety of trail lengths to make it a good location to improve cross-country skiing skills. Maine Master Naturalist volunteers will join the snowshoers along the trail to point out animal tracks and teach about wildlife survival. To register call 442-8400 or email [email protected] by Feb. 11.

Winter Tree ID, 10 a.m., Holden

Join Steve Sader for a tree identification walk. Learn how to identify evergreen conifers and hardwood trees in their leaf-off condition, using clues about the size, form, habitat, buds, leaf scars, fruit and bark characteristics. Also learn how to use a winter plant key to identify unknown species. Bring binoculars and a hand lens if you have them. The cost is $15. Register at maineaudubon.org. Meet at the Fields Pond Audubon Center. Call 989-2591 with any questions or go to maineaudubon.org.

Send calendar items to Deirdre Fleming at [email protected]