Cross your fingers for clear skies as the Audubon Naturalist Society celebrates the New Year with a brisk walk under the light of the year’s first full moon. We’ll head upriver on the C&O Canal towpath from Swain’s Lock, enjoying the shadows of arching sycamore trees and listening for the calls of owls and winter-active mammals. Distance covered will depend on the weather and conditions underfoot. Cost is $25 for ANS members; $35 for non members. Register online; meeting location to be announced.