Walking through bare fields in the chill and birdless world some winter days, it is brought home to us what an _essential_ feature of our surroundings the birds are, what a lack there is when they are absent! A certain poverty lies over the earth; the sky is no longer complete without a swift or a martin. Birds are part of the landscape; it is they which animate it. Rarely, when it seems most destitute, a flock of snow-buntings will come swirling over the pasture, like great snowflakes driven before the blast. Again, as the wind will pick up dry snow and blow it over the field, they are off and whirling away, glittering in the pale yellow light of the winter day as they wheel and come to the ground. But their presence has redeemed and softened the austere landscape, made the earth habitable once more and the bare fields friendly and companionable. The first snipe and plover in the spring remind us what stay-at-homes are we, what wanderers they. We must appear to them but poor mollusks, as they come and go each year on their way from Patagonia to the Arctic Circle. In how many States, in what diversity of climes they are at home! And wherever they may be they get their own living by no one's favor. This prodigious self-reliance affects one as a species of heroism, whereas it is as unconscious as the falling rain. What familiarity with the elements and with natural features of the earth the migrating birds must acquire--with winds and clouds, with mountain chains and rivers and coast lines! They know the landmarks and guide-posts of two continents and can find their own way. The whistle of curlew, or the honk of wild geese high in the air, seems a greeting out of the clouds from these cosmopolites, to us, sitting rooted to the earth beneath. A flock of wild geese on the wing is no less than an inspiration. When that strong-voiced, stout-hearted company of pioneers pass overhead, our thoughts ascend and sail with them over the roofs of the world. As band after band come into the field of vision--minute glittering specks in the distant blue--to cross the golden sea of the sunset and disappear in the northern twilight, their faint melodious honk is an Orphean strain drawing irresistibly. A sort of noble madness seizes the birds in the spring, so that an exodus of inconceivable extent takes place toward the North, as though the Pole were a magnet to them. There is a suggestion of epic splendor in this vast impulse, this flight of the feathered tribes of the earth. We may well ask the bobolink, What news from Brazil? and the returning plover, What of the Frozen Sea? What bird-memories do they cherish of these remote regions? It casts a halo of romance about them, that they should thus be at home in lands that may perhaps remain ever unvisited by us.