Maple Sunday at Viles Arboretum, Augusta, 11 a.m. to 2 p.m. today. Try some sugar on snow and learn how trees are tapped, sap is gathered and syrup produced. Take a wagon ride and view the sights and sounds of spring. Order up a pancake lunch with maple sausage and maple sugar as a topping. Nature activities for children will include making a twig display to take home of the various maple trees in Maine. For more information, go online to www.vilesarboretum.org or call 626-7989. 

Woodcock Walks, 7 p.m. April 7 and 8, led by Paul Dest. Meet at Laudholm Farm and walk the Wells Reserve at sunset to watch the aerial courtship sky dance. Cost is $5 for York County Audubon Society and Laudholm members, $7 for non-members. Preregistration is required. Contact the Wells Reserve at 646-1555 to reserve your space. 

Bird migration presentation, 6:30 p.m. April 7, Friends Community Room at the Rockland Public Library, co-sponsored with Mid-Coast Audubon. Naturalist Bill Goodwill will discuss types of bird migration, preparations for the journey, finding the way, flight plans, hazards and delays, winter homes and finally the return. Free. For more information, call 594-0310. 

Great Maine Bike Swap, 10 a.m. to 2 p.m. April 10, University of Southern Maine’s Sullivan Gymnasium, 66 Falmouth Street, Portland. Sponsored by Bicycle Coalition of Maine. Bikes for sale should be dropped off at that location between 8 and 9:30 a.m. on the day of the sale. You can buy a bike, sell a bike or do both. There will be a large area for test riding, exhibits by local bike shops, food and drinks for sale and more. Admission is $3, with free admission for students at the University of Maine, University of Southern Maine, University of New England and Southern Maine Community College, and for children 12 or younger. A small commission on all sales supports the coalition’s work to improve bicycling in Maine. For more information, visit www.BikeMaine.org or call 623-4511. 

Hunter safety course, Monmouth Fish and Game, 6 to 9 p.m. April 4, 6, 11 and 13; and 9 a.m. to 3 p.m. April 9. The course covers 14 hours of required materials, plus three hours of strongly recommended work. Attendance at all classes is required. Register by calling Doug Beck at 513-6772. Registration fee is $10. 

Looking ahead

Maine Guide Training Program, Skowhegan Community Center, 39 Poulin Drive, Skowhegan, April 14, 15, 16 and 17. The course prepares students for taking the state’s licensing exam for recreational, hunting and fishing guides. The cost is $475 per person, and $200 deposit is required upon registration. Contact Carroll Ware at Fins and Furs Adventures at 474-5430. 

Spring Nature Day Camp, offered by Friends of Cobbossee Watershed, will be held during April school vacation week at the YMCA Camp of Maine on Cobbossee Lake in East Winthrop. Two two-day sessions will be offered. The first is April 18-19, and the second is April 20-21. Both session are open to students in grades 3 to 5 and will run from 9 a.m. to 3 p.m. each day. Cost for each two-day session is $75 per person and includes all equipment and a daily afternoon snack. Early registration is recommended. Registration forms can be downloaded at www.watershedfriends.com. Contact Tamara Whitmore at 621-4100 or tamara@watershedfriends.com. 

York County Audubon field trip, 7 a.m. April 17, Green Point Farm WMA. Meet at the Burger King in Saco. This trip will focus on finding migrating waterfowl and will entail driving. Please plan on carpooling. Contact Pat Sanborn at 781-9837. 

From Cosmos to the Backyard, 7 p.m. April 19. Free presentation by photographer Kirk Rogers at the Mather Auditorium of the Wells Reserve at Laudholm Farm. Rogers will talk about birding with lenses and observing the heavens with cameras and telescopes. Visit his website at kiroastro.com. 

Chainsaw training classes, hosted by David Jenney and Mike Maines. The first will take place at 9 a.m. May 14 at Jenney’s woodlot in Vassalboro. The rain date is May 21. This class is a basic introduction to using your chainsaw, which will be

similar to the Level 1 Game of Logging training. The second class is at 9 a.m. June 4, also at Jenney’s woodlot. The rain date is June 11. This class will focus on reduced

downtime maintenance and filing. Both classes cost $75, with a minimum of seven people required for the class to take place. Advance registration and payment required. Contact Jenney at dgjenney@gmail.com or 923-3483. 

Ongoing

Walk-On Adventures, L.L. Bean, Freeport. Snowshoeing, 9:30 a.m. to noon, and cross-country skiing, 1 to 3 p.m. today, conditions permitting. Equipment provided. $15. Call (877) 755-2326 or stop by the information desk in the Discovery Lobby. 

Clean Water for Clams, children’s activity series sponsored by the Kennebec Estuary Land Trust at the Patten Free Library in Bath from 3:30 to 4:40 p.m. each Thursday in April. For ages 6 to 11. Environmental educator Becky Kolak will offer water experiments, discussion and crafts on the importance of clean water for shellfish and for people. No registration is necessary. Contact Kolak at 442-8400 or visit www.kennebecestuary.org. 

The Portland Water District invites preschoolers to join it for environmentally themed stories, activities and crafts. Fun with Frogs, April 15. Programs run 10 a.m. to noon at the Sebago Lake Ecology Center in Standish. To register, email sebagolake@pwd.org or call 774-5961, ext. 3319 or 3320. Donations support loon preservation. Scholarships are available, and snacks are provided. 

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. For more information, call 781-2330, ext. 209. 

The Kennebec Land Trust and Colby College will sponsor the Kennebec Land Trust Lyceum Series “New England Nature Writers of the Land.” The series will focus on connections between people and the land, expressed through writing. Lectures include “A Party in the Woods, Loss and Celebration Under a Changing Sky,” at 7 p.m. April 11, in the Olin Center at Colby College. Field programs include Earth Week: Birding, Hiking and Nature Writing at Gannett Woods & Wyman Forest, April 23, and New England Nature Writers and Vernal Pool Ecology for Teachers, May 6. Call 377-2848 or visit www.tklt.org. 

Spring Hawk Watch, Bradbury Mountain State Park, Pownal. Freeport Wild Bird Supply teams up with Nikon Sport Optics to sponsor the project that collects valuable data while providing an enjoyable and educational experience for visitors. Andy Northrup, official counter, will be stationed at the Bradbury summit from 9 a.m. to 5 p.m. daily until May 15. The hawk watch is free, but there is an entry fee to the park: $3 for Maine residents ages 12-64, $1 for ages 5-11, free for those over 64 and under 5. Go online to www. freeportwildbirdsupply.com for more information.