THURSDAY

Electronic birding

7 p.m., Falmouth

Maine Audubon will hold the third of a four-part lecture series on eBirding next week. At Gilsland Farm in Falmouth, staff naturalist Doug Hitchcox will explain why field notebooks have turned into eBird checklists. Learn what digital resources are available and how to use them. This week the group will look at spectrograms of bird songs and calls, and radar images of birds migrating. Cost is $10. To learn more, go to www.maineaudubon.org.

SATURDAY

Winter ecology

1 p.m. in Holden

The Maine Audubon naturalists at Fields Pond Nature Center will lead a winter ecology class, explaining how birds and plants survive in frigid temperatures. The group also will investigate tracks and traces of critters. Call the Audubon center to register, at 989-2591. Cost is $10.

UPCOMING

Yoga Time

10 a.m., March 5, Holden

Join the Maine Audubon chapter at the Fields Pond Nature Center in Holden for a weekly yoga class. Cost is $10, and the classes continue into May. For more information, call 989-2591.

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