of those I observed commonly pass this season much farther north. But the geographical distribution of birds is rather a climatical one. The same temperature, though under different parallels, usually attracts the same birds; difference in altitude being equivalent to the difference in latitude. A given height above the sea level under the parallel of 30° may have the same climate as places under that of 35°, and similar Flora and Fauna. At the head-waters of the Delaware, where I write, the latitude is that of Boston, but the region has a much greater elevation, and hence a climate that compares better with the northern part of the State and of New England. Half a day's drive to the southeast brings me down into quite a different temperature, with an older geological formation, different forest timber, and different birds,—even with different mammals. Neither the little Gray Rabbit nor the little Gray Fox is found in my locality, but the great Northern Hare and the Red Fox are seen here. In the last century a colony of beavers dwelt here, though the oldest inhabitant cannot now point to even the traditional site of their dams. The ancient hemlocks, whither I propose to take the reader, are rich in many things beside birds. Indeed, their wealth in this respect is owing mainly, no doubt, to their rank vegetable growths, their fruitful swamps, and their dark, sheltered retreats.
Their history is of an heroic cast. Ravished and torn by the tanner in his thirst for bark, preyed upon by the lumberman, assaulted and beaten back by the settler, still their spirit has never been broken, their energies never paralyzed. Not many years ago a public highway passed through them, but it was at no time a tolerable road; trees fell across it, mud and limbs choked it up, till finally travellers took the hint and went around; and now, walking along its deserted course, I see only the footprints of coons, foxes, and squirrels.
Nature loves such woods, and places her own seal upon them. Here she shows me what can be done with ferns and mosses and lichens. The soil is marrowy and full of innumerable forests. Standing in these fragrant aisles, I feel the strength of the vegetable kingdom and am awed by the deep and inscrutable processes of life going on so silently about me.
No hostile forms with axe or spud now visit these solitudes. The cows have half-hidden ways through them, and know where the best browsing is to be had. In spring the farmer repairs to their bordering of maples to make sugar; in July and August women and boys from all the country about penetrate the old Barkpeeling for raspberries and blackberries; and I know a youth who wonderingly follows their languid stream casting for trout.
In like spirit, alert and buoyant, on this bright June morning go I also to reap my harvest,—pursuing a sweet more delectable than sugar, fruit more savory than berries, and game for another palate than that tickled by trout.
June, of all the months, the student of ornithology can least afford to lose. Most birds are nesting then, and in full song and plumage. And what is a bird without its song? Do we not wait for the stranger to speak? It seems to me that I do not know a bird till I have heard its voice; then I come nearer it at once, and it possesses a human interest to me. I have met the Gray-cheeked Thrush (Turdus aliciæ) in the woods, and held him in my hand; still I do not know him. The silence of the Cedar-Bird throws a mystery about him which neither his good looks nor his petty larcenies in cherry time can dispel. A bird's song contains a clew to its life, and establishes a sympathy, an understanding, between itself and the admiring listener.
I descend a steep hill, and approach the hemlocks through a large sugar-bush. When twenty rods distant, I hear all along the line of the forest the incessant warble of the Red-eyed Flycatcher (Vireosylvia olivacea), cheerful and happy as the merry whistle of a schoolboy. He is one of our most common and widely distributed birds. Approach any forest at any hour of the day, in any kind of weather, from May to August, in any of the Middle or Eastern districts, and the chances are that the first note you hear will be his. Rain or shine, before noon or after, in the deep forest or in the village grove,—when it is too hot for the thrushes or too cold and windy for the warblers,—it is never out of time or place for this little minstrel to indulge his cheerful strain. In the deep wilds of the Adirondac, where few birds are seen and fewer heard, his note was almost constantly in my ear. Always busy, making it a point never to suspend for one moment his occupation to indulge his musical taste, his lay is that of industry and contentment. There is nothing plaintive or especially musical in his performance, but the sentiment expressed is eminently that of cheerfulness. Indeed the songs of most birds have some human significance, which, I think, is the source of the delight we take in them. The song of the Bobolink, to me, expresses hilarity; the Song-Sparrow's, faith; the Bluebird's, love; the Cat-Bird's, pride; the White-eyed Fly-catcher's, self-consciousness; that of the Hermit-Thrush, spiritual serenity; while there is something military in the call of the Robin, and unalloyed contentment in the warble of the Red-eyed Vireo.
This bird is classed among the flycatchers, but is much more of a worm-eater, and has few of the traits or habits of the Muscicapa or the true Sylvia. He resembles somewhat the Warbling Vireo (Vireo gilvus), and the two birds are often confounded by careless observers. Both warble in the same cheerful strain, but the latter more continuously and rapidly. The Red-Eye is a larger, slimmer bird, with a faint bluish crown, and a light line over the eye. His movements are peculiar. You may see him hopping among the limbs, exploring the under side of the leaves, peering to the right and left,—now flitting a few feet, now hopping as many,—and warbling incessantly, occasionally in a subdued tone, which sounds from a very indefinite distance. When he has found a worm to his liking, he turns lengthwise of the limb, and bruises its head with his beak before devouring it.
As I enter the woods the Slate-colored Snowbird (Fringilla Hudsonia) starts up before me and chirps sharply. His protest when thus disturbed is almost metallic in its sharpness. He breeds here, and is not esteemed a snowbird at all, as he disappears at the near approach of winter, and returns again in spring, like the Song-Sparrow, and is not in any way associated with the cold and the snow. So different are the habits of birds in different localities. Even the Crow does not winter here, and is seldom seen after December or before March.
The Snow-Bird, or "Black Chipping-Bird," as it is known among the farmers, is the finest architect of any of the ground-builders known to me. The site of its nest is usually some low bank by the roadside near a wood. In a slight excavation, with a partially concealed entrance, the exquisite structure is placed. Horse-hair and cow-hair are plentifully used, imparting to the interior of the nest great symmetry and firmness as well as softness.
Passing down through the maple arches, barely pausing to observe the antics of a trio of squirrels,—two gray ones and a black one,—I cross an ancient brush fence and am fairly within the old hemlocks, and in one of the most primitive, undisturbed nooks. In the deep moss I tread as with muffled feet, and the pupils of my eyes dilate in the dim, almost religious light. The irreverent red squirrels, however, run and snicker at my approach, or mock the solitude with their ridiculous chattering and frisking.
This nook is the chosen haunt of the Winter Wren. This is the only place and these the only woods in which I find him in this vicinity. His voice fills these dim aisles, as if aided by some marvellous sounding-board. Indeed, his song is very strong for so small a bird, and unites in a remarkable degree brilliancy and plaintiveness. I think of a tremulous vibrating tongue of silver. You may know it is the song of a wren, from its gushing lyrical character; but you must needs look sharp to see the little minstrel, especially while in the act of singing. He is nearly the color of the ground and the leaves; he never ascends the tall trees, but keeps low, flitting from stump to stump and from root to root, dodging in and out of his hiding-places, and watching all intruders with a suspicious eye. He has a very perk, almost comical look. His tail stands more than perpendicular: it points straight toward his head. He is the least ostentatious singer I know of. He does not strike an attitude, and lift up his head in preparation, and, as it were, clear his throat; but sits there on the log and pours out his music, looking straight before him, or even down at the ground. As a songster, he has but few superiors. I do not hear him after the first week in July.
While sitting on this soft-cushioned log, tasting the pungent acidulous wood-sorrel (Oxalis acetorella), the blossoms of which, large
