sparrow is not a beautiful bird except in our affections and associations, and its eggs are not beautiful as eggs go, – four or five little freckled spheres, that, like the bird itself, blend well with the ground upon which they are placed.
The eggs of the "chippie," or social sparrow, are probably the most beautiful of sparrow eggs, being of a bright bluish green with a ring of dark purple spots around the larger end.
Generally there is but little relation between the color of the bird and the color of its egg. For the most part, the eggs of birds that occupy open, exposed nests are of some tint that harmonizes well with the surroundings. With the addition of specks of various hue, they are rendered still less conspicuous. The eggs of the scarlet tanager are greenish blue, with faint brown or purplish markings. The blackbird lays a greenish blue egg also, with various markings. Indeed, the favorite ground tint of the birds that build open nests is a greenish blue; sometimes the blue predominates, sometimes the green; while the eggs of birds that build concealed nests, or lay in dark cavities, are generally white, as is the case with the eggs of all our woodpeckers, for instance. The eggs of the bluebird are bluish white.
Among the flycatchers, the nest of the phœbe is most concealed, at least from above, and her eggs are white, while those of nearly all the other species are more or less tinted and marked. The eggs of the hummingbird are white, but the diminutiveness of their receptacle is a sufficient concealment. Another white egg is that of the kingfisher, deposited upon fish-bones at the end of a hole in the bank eight or nine feet long. The bank swallow also lays white eggs, as does the chimney swallow, the white-bellied swallow, and the purple martin. The eggs of the barn swallow and cliff swallow are more or less speckled. In England the kingfisher (smaller and much more brilliantly colored than ours), woodpeckers, the bank swallow, the swift, the wryneck (related to the woodpecker), and the dipper also lay white eggs.
A marked exception to the above rule is furnished by the eggs of the Baltimore oriole, perhaps the most fantastically marked of all our birds' eggs. One would hardly expect a plainly marked egg in such a high-swung, elaborately woven, deeply pouched, aristocratic nest. The threads and strings and horsehairs with which the structure is sewed and bound and stayed are copied in the curious lines and markings of the treasures it holds. After the oriole is through with its nest, it is sometimes taken possession of by the house wren in which to rear its second brood. The long, graceful cavity, with its fine carpet of hair, is filled with coarse twigs, as if one were to build a log hut in a palace, and the rusty-colored eggs of the little busybody deposited there. The wren would perhaps stick to its bundle of small fagots in the box or pump tree, and rear its second brood in the cradle of the first, were it not that by seeking new lodgings time can be saved. The male bird builds and furnishes the second nest, and the mother bird has begun to lay in it before the first is empty.
The chatter of a second brood of nearly fledged wrens is heard now (August 20) in an oriole's nest suspended from the branch of an apple-tree near where I write. Earlier in the season the parent birds made long and determined attempts to establish themselves in a cavity that had been occupied by a pair of bluebirds. The original proprietor of the place was the downy woodpecker. He had excavated it the autumn before, and had passed the winter there, often to my certain knowledge lying abed till nine o'clock in the morning. In the spring he went elsewhere, probably with a female, to begin the season in new quarters. The bluebirds early took possession, and in June their first brood had flown. The wrens had been hanging around, evidently with an eye on the place (such little comedies may be witnessed anywhere), and now very naturally thought it was their turn. A day or two after the young bluebirds had flown, I noticed some fine, dry grass clinging to the entrance to the cavity; a circumstance which I understood a few moments later, when the wren rushed by me into the cover of a small Norway spruce, hotly pursued by the male bluebird. It was a brown streak and a blue streak pretty close together. The wrens had gone to housecleaning, and the bluebird had returned to find his bed and bedding being pitched out-of-doors, and had thereupon given the wrens to understand in the most emphatic manner that he had no intention of vacating the premises so early in the season. Day after day, for more than two weeks, the male bluebird had to clear his premises of these intruders. It occupied much of his time and not a little of mine, as I sat with a book in a summer-house near by, laughing at his pretty fury and spiteful onset. On two occasions the wren rushed under the chair in which I sat, and a streak of blue lightning almost flashed in my very face. One day, just as I had passed the tree in which the cavity was placed, I heard the wren scream desperately; turning, I saw the little vagabond fall into the grass with the wrathful bluebird fairly upon him; the latter had returned just in time to catch him, and was evidently bent on punishing him well. But in the squabble in the grass the wren escaped and took refuge in the friendly evergreen. The bluebird paused for a moment with outstretched wings looking for the fugitive, then flew away. A score of times during the month of June did I see the wren taxing every energy to get away from the bluebird. He would dart into the stone wall, under the floor of the summer-house, into the weeds, – anywhere to hide his diminished head. The bluebird, with his bright coat, looked like an officer in uniform in pursuit of some wicked, rusty little street gamin. Generally the favorite house of refuge of the wrens was the little spruce, into which their pursuer made no attempt to follow them. The female would sit concealed amid the branches, chattering in a scolding, fretful way, while the male with his eye upon his tormentor would perch on the topmost shoot and sing. Why he sang at such times, whether in triumph and derision, or to keep his courage up and reassure his mate, I could not make out. When his song was suddenly cut short, and I glanced to see him dart down into the spruce, my eye usually caught a twinkle of blue wings hovering near. The wrens finally gave up the fight, and their enemies reared their second brood in peace.
That the wren should use such coarse, refractory materials, especially since it builds in holes where twigs are so awkward to carry and adjust, is curious enough. All its congeners, the marsh wrens, the Carolina wren, the winter wren, build of soft flexible materials. The nest of the winter wren, and of the English "Jenny Wren," is mainly of moss, and is a marvel of softness and warmth.
One day a swarm of honey-bees went into my chimney, and I mounted the stack to see into which flue they had gone. As I craned my neck above the sooty vent, with the bees humming about my ears, the first thing my eye rested upon in the black interior was two long white pearls upon a little shelf of twigs, the nest of the chimney swallow, or swift, – honey, soot, and birds' eggs closely associated. The bees, though in an unused flue, soon found the gas of anthracite that hovered about the top of the chimney too much for them, and they left. But the swallows are not repelled by smoke. They seem to have entirely abandoned their former nesting-places in hollow trees and stumps and to frequent only chimneys. A tireless bird, never perching, all day upon the wing, and probably capable of flying one thousand miles in twenty-four hours, they do not even stop to gather materials for their nests, but snap off the small dry twigs from the treetops as they fly by. Confine one of these swallows to a room and it will not perch, but after flying till it becomes bewildered and exhausted, it clings to the side of the wall till it dies. I once found one in my room on returning, after several days' absence, in which life seemed nearly extinct; its feet grasped my finger as I removed it from the wall, but its eyes closed, and it seemed about on the point of joining its companion which lay dead upon the floor. Tossing it into the air, however, seemed to awaken its wonderful powers of flight, and away it went straight toward the clouds. On the wing the chimney swallow looks like an athlete stripped for the race. There is the least appearance of quill and plumage of any of our birds, and, with all its speed and marvelous evolutions, the effect of its flight is stiff and wiry. There appears to be but one joint in the wing, and that next the body. This peculiar inflexible motion of the wings, as if they were little sickles of sheet iron, seems to be owing to the length and development of the primary quills and the smallness of the secondary. The wing appears to hinge only at the wrist. The barn swallow lines its rude masonry with feathers, but the swift begins life on bare twigs, glued together by a glue of home manufacture as adhesive as Spaulding's.
I have wondered if Emerson referred to any particular bird in these lines from "The Problem: " —
"Know'st thou what wove yon wood-bird's nest
Of
