I happened to be passing near the tree when, on again surveying the premises one afternoon, they found him in. The male bluebird was very angry, and I suppose looked upon the innocent downy as an intruder. He seized on him, and the two fell to the ground, the speckled woodpecker quite covered by the blue coat of his antagonist. Downy screamed vigorously, and got away as soon as he could, but not till the bluebird had tweaked out a feather or two. He is evidently no fighter, though one would think that a bird that had an instrument with which it could drill a hole into a tree could defend itself against the soft-billed bluebird.
Two seasons the English sparrows ejected the bluebirds and established themselves in it, but were in turn ejected by myself, their furniture of hens' feathers and straws pitched out, and the bluebirds invited to return, which later in the season they did.
The new cavity which downy is now drilling is just above the old one and near the top of the stub. Its wells are usually sunk to a depth of six or eight inches, but in the present case it cannot be sunk more than four inches without breaking through into the old cavity. Downy seems to have considered the situation, and is proceeding cautiously. As she passed last night in her new quarters I am inclined to think it is about finished, and there must be at least one inch of wood beneath her. She worked vigorously the greater part of the day, her yellow chips strewing the snow beneath. I paused several times to observe her proceedings. After her chips accumulate she stops her drilling and throws them out. This she does with her beak, shaking them out very rapidly with a flirt of her head. She did not disappear from sight each time to load her beak, but withdrew her head and appeared to seize the fragments as if from her feet. If she had had a companion I should have thought he was handing them up to her from the bottom of the cavity. Maybe she had them piled up near the doorway.
The woodpeckers, both the hairy and the downy, usually excavate these winter retreats in the fall. They pass the nights and the stormy days in them. So far as I have observed, they do not use them as nesting-places the following season. Last night when I rapped on the trunk of the old apple-tree near sundown, downy put out her head with a surprised and inquiring look, and then withdrew it again as I passed on.