This shaking stub of the chickadees was standing directly beneath a great overshadowing pine, where, if no partridge bumped into it, if two squirrels did not scamper up it together, if the crows nesting overhead did not discover it, if no strong wind bore down upon it from the meadow side, it might totter out the nesting season. But it didn’t. The birds were leaving too much to luck. I knew it, and should have pushed their card house down, then and there, and saved the greater ruin later. Perhaps so, but I was too interested in their labor.

Both birds were working when I discovered them, and so busily that my coming up did not delay them for a single billful. It was not hard digging, but it was very slow, for chickadee is neither carpenter nor mason. He has difficulty in killing a hard-backed beetle. So, whenever you find him occupying a clean-walled cavity, with a neat, freshly clipped doorway, you may be sure that some woodpecker built the house, not this short-billed, soft-tailed little tit. He lacks both the bill-chisel and the tail-brace. Perhaps the explanation of his fondness for birch trees lies here: they die young and soon decay.

The birds were going down through the top, not by a hole in the leathery rind of the sides, for the bark would have been too tough for their beaks. They would drop into the top of the stub, pick up a wad of decayed wood, and fly off to the dead limb of the pine. Here, with a jerk and a snap of their bills, they would scatter the stuff in a shower so thin and far around that I could neither hear it fall nor find a trace of it upon the dead leaves of the ground. This nest would never be betrayed by the workmen’s chips.

Between the pair there averaged three beakfuls of excavating every two minutes, one of the birds regularly shoveling twice to the other’s once. They looked so exactly alike that I could not tell which bird was pushing the enterprise; but I have my suspicions.

There is nothing so superior about his voice or appearance that he should thus shirk. He was doing part of his duty, apparently, but it was half-hearted work. Hers was the real interest, the real anxiety; and hers the initiative. To be a male and show off! That’s the thing. To be a male and let your wife carry the baby! The final distinctive difference between a truly humanized, civilized man and all other males of every order, is a willingness to push the baby carriage.

The finer the feathers or the song among male birds the less use they are in practical, domestic ways. Fine beaux, captivating lovers, they become little else than a nuisance as husbands. One of my friends has been watching a pair of bluebirds building. The male sat around for a week without bringing in a feather. Then one day he was seen to enter the hole, after his busy mate had just left it, and carry out a beakful of grass which he scattered to the winds in pure perversity, criticising her bungling work, maybe! More likely he was jealous.

Chickadee was no such precious fool as that. He was doing something; trying to drown his regret for the departing honeymoon in hard labor, not, however, to the danger of his health.

I sat a long time watching the work. It went on in perfect silence, not a chirp, not the sound of a fluttering wing. The swamp along whose margin the birds were building had not a joyous atmosphere. Damp, dim-shadowed, and secret, it seemed to have laid its spell upon the birds. Their very gray and black was as if mixed of the dusk, and of the gray, half-light of the swamp; their noiseless coming and going was like the slipping to and fro of shadows. They were a part of it all, and that sharing was their defense, the best defense they knew.

It didn’t save their nest, however. They felt and obeyed the spirit of the swamp in their own conduct, but the swamp did not tell them where to build. It was about three weeks later that I stopped again under the pine and found the birch stub in pieces upon the ground. Some robber had been after the eggs and had brought the whole house tumbling down. This is not the fate of all such birch-bark houses. Now and again they escape; but it is always a matter for wonder.

I was following an old disused wood road once when I scared a robin from her nest. Her mate joined her, and together they raised a great hubbub. Immediately a chewink, a pair of vireos, and two black and white warblers joined the robins in their din. Then a chickadee appeared. He (I say “he” knowingly; and here he quite redeems himself) had a worm in his beak. His anxiety seemed so real that I began to watch him, when, looking down among the stones for a place to step, what should I see but his mate emerging from the end of a birch stump at my very feet. She had heard the din and had come out to see what it was all about. At sight of her, he hastened with his worm, brushing my face, almost, as he darted to her side. She took it sweetly, for she knew he had intended it for her. But how do I know that? Perhaps he meant it for the young! There were no young in the nest, only eight eggs. Even after the young came (there were eight of them!), and when life, from daylight to dark, was one ceaseless, hurried hunt for worms, I saw him over and over again fly to her side caressingly and tempt her to eat.