But Winter hath his birds also; some of them such tiny bodies that one wonders how they withstand the giant cold,--but they do. Birds live on highly concentrated food,--the fine seeds of weeds and grasses, and the eggs and larvae of insects. Such food must be very stimulating and heating. A gizzard full of ants, for instance, what spiced and seasoned extract is equal to that? Think what virtue there must be in an ounce of gnats or mosquitoes, or in the fine mysterious food the chickadee and the brown creeper gather in the winter woods! It is doubtful if these birds ever freeze when fuel enough can be had to keep their little furnaces going. And, as they get their food entirely from the limbs and trunks of trees, like the woodpeckers, their supply is seldom interfered with by the snow. The worst annoyance must be the enameling of ice our winter woods sometimes get. Indeed, the food question seems to be the only serious one with the birds. Give them plenty to eat, and no doubt the majority of them would face our winters. I believe all the woodpeckers are winter birds, except the high-hole or yellow-hammer, and he obtains the greater part of his subsistence from the ground, and is not a woodpecker at all in his habits of feeding. Were it not that it has recourse to budding, the ruffed grouse would be obliged to migrate. The quail--a bird, no doubt, equally hardy, but whose food is at the mercy of the snow--is frequently cut off by our severe winters when it ventures to brave them, which is not often. Where plenty of the berries of the red cedar can be had, the cedar-bird will pass the winter in New York. The old ornithologists say the bluebird migrates to Bermuda; but in the winter of 1874-75, severe as it was, a pair of them wintered with me eighty miles north of New York city. They seem to have been decided in their choice by the attractions of my rustic porch and the fruit of a sugar-berry tree (celtis--a kind of tree-lotus) that stood in front of it. They lodged in the porch and took their meals in the tree. Indeed, they became regular lotus-eaters. Punctually at dusk they were in their places on a large laurel root in the top of the porch, whence, however, they were frequently routed by an indignant broom that was jealous of the neatness of the porch floor. But the pair would not take any hints of this kind, and did not give up their quarters in the porch or their lotus berries till spring.