One winter evening found me tramping through a swamp not far from my home, listening to the dulcet trills of the song-sparrows, which had recently returned from a brief visit to a more southern latitude. There was no snow on the ground, and the day had been pleasant; but, as evening approached, the west wind blew raw across the fields. For some reason which I cannot now recall, an impulse seized me to clamber over the fence into the adjacent meadow, where I stalked about somewhat aimlessly for a minute or two, little thinking that I was on the eve of a discovery,—one that was destined to lead me into a delightful field of investigation.

The ground was rather soggy, but a pair of tall rubber boots make one indifferent to mire and mud. The dusk was now gathering rapidly, and it was time for most birds to go to bed. I soon found, too, that they were going to bed, and, moreover, were taking lodgings in the most unexpected quarters. Imagine my surprise when, as I trudged about, the little tree-sparrows, which are winter residents in my neighborhood, flew up here and there out of the deep grass. They seemed to be hidden somewhere until I came near, and then they would suddenly dart up as if they had emerged from a hole in the ground.

This unexpected behavior led me to investigate; and I soon found that in many places there were cosey apartments hollowed out under the long, thick tufts of marsh grass, with neat entrances at one side like the door of an Eskimo hut. These hollows gave ample evidence of having been occupied by the birds, so that there could be no doubt about their being bird bedrooms. Very frequently they were burrowed in the sides of the mounds of sod raised by the winter frosts, and were thus lifted above the intervening hollows, which contained ice-cold water. In every case the overhanging grass made a thatched roof to carry off the rain.

I do not mean to say that these little dugouts were made by the birds themselves. Perhaps they were, but it is more probable that they had been scooped out the previous summer by field-mice, and had only been appropriated for sleeping-apartments by the sparrows. However that may be, they were exceedingly cunning and cosey; and soft must have been the slumbers of the feathered occupants while the wintry blasts howled unharming above them.

Prior to that discovery I had supposed, with most people, that all birds roost in trees and bushes. Later researches have proved how wide of the truth one’s unverified hypotheses may be. A week or so afterward, while strolling one evening at dusk through a favorite timber-belt, I noticed the snowbirds, or juncos, darting up from the leaves and bushes and small brush-heaps, beneath which they had found dainty little coverts from the storm. In many places crooked twigs and branches, covered with leaves, lay on the ground, leaving underneath small spaces overarched and sheltered, and into these cosey nooks the juncos had crept for the night. No enemies, at least in winter, would find them there, and their hiding-places were snug and warm. Long after dark I lingered in the woods, and everywhere startled the snow-birds from their leafy couches. At one place a whole colony of them had taken lodgings. When my passing frightened them away, they flew through the darkness into the neighboring trees. After waiting at some distance for several minutes, I returned to the spot, and found that some of the birds had gone back to their bedrooms on the ground.

In my nocturnal prowlings through the fields and lowlands, I have frequently frightened the meadowlarks from the grass, and that long before nest-building or incubation had begun. Of course, they were recognized by their nervous alarm-calls, as well as by the peculiar sound of their fluttering wings. What surprises me beyond measure is that they so often select low, boggy places for their roosts, instead of the dry pleasant upland slopes. But there is no accounting for tastes in the bird world. The grass-finches and lark-sparrows, like their relatives just mentioned, seek little hollows in the ground for bed-chambers, usually sheltered by grass tufts.

Long before day, one April morning, I made my way to the marsh so frequently mentioned in this volume. The moon was shining brightly in the southern sky. Early as it was—for as yet there was no sign of daybreak—the silvery trills of the song-sparrows rose from the bushes like a votive offering to the Queen of Night. From one part of the swamp a sweet song would ring out on the moonlit air, and would at once be taken up by another songster not far away. Then another would chime in, and another, until the whole enclosure was filled with the antiphonal melody. A silence would then fall upon the marsh like a dream-spirit, to be broken soon by another outburst of minstrelsy; and thus the nocturne continued until day broke, and it merged into the glad matin service.

But my object is to tell about bird roosts rather than about bird music. When I reached the farther end of the marsh, several sparrow songs came up from the ground. I walked with a tentative purpose toward a spot whence a song came, when the little triller sprang up affrighted. The same experiment with a number of other songsters brought a like result in each case, proving beyond doubt, I think, that at least some of the song-sparrows roost on the ground, and begin their matins before they rise from their couches, so anxious are they to put in a full day of song.

On the same morning—it was still before daybreak—a bevy of red-winged blackbirds, which had been roosting in the long grass, flew up with vociferous cries and protests at the rude awakening I had given them, just when they were enjoying their morning nap. Blame them who will for making loud ado, for there are many people who would do the same under similar provocation. Thus it will be seen that many birds sleep on the ground. My investigations lead me to this conclusion: As a rule, those birds which nest on or near the ground, and spend a considerable portion of their time in the grass, like the meadow-larks and song-sparrows, roost on the ground, while others find bushes and trees more to their taste. Still, there are exceptions to this rule; for on several occasions, while bent on my nocturnal prowlings, I have driven the turtle-dove from the ground, although this bird usually roosts in the thorn-trees and willows.[4]

The robins choose thick trees and even wild rose-bushes for roosts. In the apple-trees and pines of a neighbor’s yard across the fields these birds find sleeping-apartments early in the spring, before nest-building is begun, for a perfect deluge of robin music often pours from that locality, both morning and evening.

The white-throats, wood-sparrows, and brown thrashers make use of the thick thorn-trees of the marsh for lodgings. They flutter about in sore dismay as I approach, until I start back, lest they should impale themselves on the sharp thorns. Sometimes the thrasher ensconces himself for the night in the brush-heaps which the wood-choppers have made on the slopes, making his presence known by his peculiar way of scolding at my officious intrusion.

One cannot help admiring the wise forethought displayed by many birds in creeping into the thick thorn-bushes at night, where they may sleep without fear of attack from their nocturnal foe, the owl. Full well they seem to know he cannot force his bulky form through the thick network of branch and thorn. How he must gnash his teeth with rage—if owls ever do that—when he espies his coveted prey sleeping peacefully just beyond the reach of his talons! Still, it sometimes happens that even a small bird ventures into too close quarters in these terrible prickly bushes; for I once found a dead sparrow completely wedged in among the fierce thorns, where it had evidently been caught in such a way as to prevent its escape.

Something over a year after the preceding facts were published, I was seized with a whim to resume my investigations on bird roosts. One of my nocturnal rambles seems to be deserving of somewhat minute description. It was a delightful evening of early spring, with a warm westerly breeze stirring the bursting leaves. The sun had set, and the dusk was falling over fields and woods. The bright moon, a little more than half full, lengthened out the gloaming and added many precious minutes to the singing hours of the birds. Such a woodland chorus as I was permitted to listen to that evening! It was a rare privilege. How the wood-thrushes vied with the towhee buntings! Which would sing the latest? That seemed to be the question. At length there were several moments of silence, and I supposed all the birds had gone to sleep, when a white-throated sparrow and a wood-pewee struck in with their sweet strains; and so the chorus continued until it was really night. The wood-thrushes, I think, got in the last note of the twilight serenade.

Before it had become quite dark, I espied a wood-thrush sitting in the fork of a dogwood-tree, looking at me in a startled way; but she did not fly. I walked off some distance, remained awhile, and then returned, to find her still in her place. Then I strolled about until night had fully come; the moon shone brightly, so that it was not dark. When I went back to the dogwood-tree, the speckled breast of the thrush was still visible in the fork which she had chosen for her bed-chamber, and I wished her pleasant dreams.

While stalking about, I startled another wood-thrush, which had selected a loose brush-heap on the ground instead of a sapling or tree for a roost. The indigo-birds and bush-sparrows flew up from the blackberry bushes as I pushed my way through them. Several times the towhee buntings leaped scolding out of bed, having selected brush-heaps, or dead branches lying on the ground, for roosting-places.

A discovery was also made in regard to the sleeping-apartments of the red-headed woodpecker. As the dusk was gathering, a red-head dashed in front of me into the border of the woods, alighting on a sapling stem, and then began to shuffle upward toward a hole plainly visible from where I sat; but just as he reached the hole, another red-head appeared with a challenging air on the inside of the cavity, and red-head number one darted away with a cry of alarm. Now was my time to discover, if possible, where red-head number two would roost. So I kept a close watch on the cavity, waiting about, as previously said, until nightfall, and then, keeping my eye on the hole, so that the bird could not fly out without being seen, I made my way to the sapling. Intently watching the hole with my glass, I tapped the stem of the tree with my heel, when, in the moonlight, a red head and long, black beak were protruded from the opening above. The woodpecker was within, that much was proved; and when I had beaten against the tree, he had sprung up to the orifice to see who was thus impolitely disturbing his evening slumbers. He turned his head sidewise, and looked down at me with his keen beady eyes; but although I tapped against the tree again and again, he would not leave the cavity. There can be no doubt that it was his bedroom,—that cosey apartment in the sapling,—for it was still too early in the season for the bird to begin nesting, as he had arrived only two or three days before from his winter residence in the south. Very likely most woodpeckers roost in the cavities which they hew in trees, for I do not see why the one into whose private affairs I pried that evening should have been an exception. He most probably was only following the customs of his tribe from time immemorial.[5]

A number of experiments made with young birds purloined from the nest—I must beg the feathered parents’ forgiveness—have added several interesting facts to the subject in hand. One spring I became guardian, purveyor, and man-of-all-work to a pair of young flickers, taken from a cavity in an old apple-tree. They were kept in a large cage, in which I placed sapling boughs of considerable size. They had not become my protÉgÉs many days before they insisted on converting these upright branches into sleeping-couches, clinging to the vertical boles with their stout claws, and pillowing their heads in the feathers of their backs. In this position they slept as comfortably as the thrushes and orioles confined in other cages slept on their horizontal perches, or, for that matter, as I slept in my own bed. They even slept on the under side of an oblique branch. One of them passed one night on a horizontal perch, although apparently his slumbers were not quite so sound and refreshing as they would have been had he roosted in the wonted upright position. Queerest of all, these woodpeckers sometimes selected the side of the cage itself for a roosting-place, thrusting their claws into the crevice between the door and its frame. Wherever they roosted, their tails were made to do duty as braces, by being pressed tightly against the wall to which they clung. A pair of young red-headed woodpeckers behaved in much the same way, always preferring to sleep on an upright perch.

During the spring of 1893 I placed in a cage the following birds, all taken while in a half-callow state, from the nest: Two cat-birds, one red-winged blackbird, one cow-bunting, and two meadow-larks. In a few days all of them proclaimed their species, as well as the inexorable law of heredity, by selecting such roosts as were best adapted to them, and that without any instruction whatever from adult birds. The meadow-larks almost invariably squatted on the grass with which the floor of the cage was lined, usually scratching and waddling from side to side until they had made cosey hollows to fit their bodies; while the remaining inmates flew up to the perches when bed-time came.

It was quite interesting to look in upon my group of sleeping pets of an evening, part of them roosting in the lower story of the cage and the rest in the upper story. Several times, however, one of the larks slept on a perch, and the red-wing, after the cat-birds and bunting had been removed from the cage, occasionally seemed to think the upstairs a little lonely, and so he cuddled down on the grass below, edging up close to the larks. The strangely assorted bedfellows slept together in this way like happy children.