Thoreau writes in his journal:
The chickadee is the bird of the wood the most unfailing. When, in a windy, or in any, day, you have penetrated some thick wood like this, you are pretty sure to hear its cheery note therein. At this season it is almost their sole inhabitant.
I see here to-day one brown creeper busily inspecting the pitch pines. It begins at the base, and creeps rapidly upward by starts, adhering close to the bark and shifting a little from side to side often till near the top, then suddenly darts off downward to the base of another tree, where it repeats the same course . . .