Chickadees don’t migrate, so their winter plumage is extra dense. On cold nights, they seek out snug cavities or finagle their bodies under flaps of bark—and then they slow things way down.

Emily RussellSpring brings snowmelt and chickadees ... winter could linger here for weeks if not another month in the Adirondacks. There is still deep snow on the trail and in the shade of the trees.

The most widespread, numerous, and geographically variable chickadee, this bird brightens winter days at bird feeders and eagerly takes advantage of nest boxes. It is curious, with little or no ...