BANGOR — Bangor Land Trust guided moonlight walk 5:30 p.m. Sunday, Dec. 19, Walden-Parke Preserve. Bring boots, warm layers, flashlight or headlamp and walking stick if you like. Trail is broad and level. Meet at land trust kiosk, end of Tamarack Trail. To get there, go north on Essex Street about 4 miles from intersection with Stillwater Avenue. Just past Church Road take next right onto Walden-Parke Way. Turn right onto Tamarack Trail and park at end of road at kiosk. If weather is poor, walk will be cancelled. Call 942-1010 or visit www.bangorlandtrust.org for information.
ORLAND — Great Pond Mountain Conservation Trust full moon solstice hike in Great Pond Mountain Wildlands, 4 p.m. Saturday, Dec. 18. Meet at Wildlands South Gate on Route 1 (just south of Route 176 intersection in East Orland). We’ll hike Esker Path, up Hillside Trail and, if conditions and energy permit, to top of Oak Hill — two hours, 5 miles round-trip, shorter if conditions warrant. Bring good footgear (snowshoes if needed), headlamp or flashlight, snacks, water and warm clothes. Rain-snow date is 4 p.m. Sunday. For information, call Jennifer at 469-2045.
ORONO — Maynard F. Jordan Planetarium Christmas Eve Special, “Season of Light,” 2 p.m. Friday, Dec. 24, Wingate Hall, University of Maine. Travel through history to discover how certain traditions came to be and the meaning of all these lights we see this time of year. All tickets $3; seating is limited so reservations are recommended. UM students free with MaineCard. For information, call Alan Davenport at 581-1341 or visit www.GalaxyMaine.com.
ORONO — Maynard F. Jordan Planetarium star shows, Wingate Hall, University of Maine. Two shows for the whole family 7 p.m. Friday and Saturday, Dec. 17-18; and children’s favorite “Worlds of Wonder,” 2 p.m. Sunday, Dec. 19. Call Alan Davenport at 581-1341 or visit www.GalaxyMaine.com. All tickets $3. UMaine students free with MaineCard.
PORTLAND — Natural Resources Council of Maine Polar Plunge 2010 at East End Beach, noon Friday, Dec. 31. Support NRCM’s work to curb global warming. East End Beach is off Eastern Promenade on Cutter Street. Participants are asked to raise a minimum of $50. All funds raised will support NRCM’s work to ensure energy efficiency, clean air and renewable energy sources in Maine. Call Stacie Haines at 430-0127 or visit http://www.nrcm.org/polar_plunge_II.asp.
UNITY — Sebasticook Regional Land Trust invites birders to participate in 2010 Unity Christmas Bird Count on Dec. 18. Contributes to North American database for National Audubon Society Christmas Bird Count. Birders of all skill levels welcome at any level of participation. Count is a tally of individuals of each bird species during one 24-hour period in early winter, midnight to midnight within a 7.5-mile radius of intersection of Quaker Hill Road and Route 202-9 in Unity, and divided into several sectors, each assigned to a team of birders. Observers may choose to watch birds at home feeders within the circle and record sightings. Call 948-3766, or e-mail firstname.lastname@example.org.