Across the fields in the early morning I hear some of the rare April birds,--the chewink and the brown thrasher. The robin, bluebird, song sparrow, phoebe-bird, etc., come in March; but these two ground-birds are seldom heard till toward the last of April. The ground-birds are all tree-singers or air singers; they must have an elevated stage to speak from. Our long-tailed thrush, or thrasher, like its congeners the catbird and mocking-bird, delights in a high branch of some solitary tree, whence it will pour out its rich and intricate warble for an hour together. This bird is the great American chipper. There is no other bird that I know of that can chip with such emphasis and military decision as this yellow-eyed songster. It is like the click of a giant gun-lock. Why is the thrasher so stealthy? It always seems to be going about on tiptoe. I never knew it to steal anything, and yet it skulks and hides like a fugitive from justice. One never sees it flying aloft in the air and traversing the world openly, like most birds, but it darts along fences and through bushes as if pursued by a guilty conscience. Only when the musical fit is upon it does it come up into full view, and invite the world to hear and behold. The chewink is a shy bird also, but not stealthy. It is very inquisitive, and sets up a great scratching among the leaves, apparently to attract your attention. The male is perhaps the most conspicuously marked of all the ground-birds except the bobolink, being black above, bay on the sides, and white beneath. The bay is in compliment to the leaves he is forever scratching among,--they have rustled against his breast and sides so long that these parts have taken their color; but whence come the white and black? The bird seems to be aware that his color betrays him, for there are few birds in the woods so careful about keeping themselves screened from view. When in song, its favorite perch is the top of some high bush near to cover. On being disturbed at such times, it pitches down into the brush and is instantly lost to view.