In the river near the Nine-Acre Corner bridge.

 April 22.

It was high water again about a week ago, Mann thinks within three or four inches as high as at end of winter.

He obtained to-day the buffle-headed duck, diving in the river near the Nine-Acre Corner bridge. I identify it at sight as my bird seen on Walden. 

I hear a chip-bird.

H. D. Thoreau, Journal, April 22, 1861

My bird seen on Walden. See December 26, 1853 ("Saw in [Walden] a small diver, probably a grebe or dobchick, dipper, or what-not, ... It had a black head, a white ring about its neck, a white breast, black back, and apparently no tail.”); April 19, 1855 ("A little duck, asleep with its head in its back, exactly in the middle of the pond. It has a moderate-sized black head and neck, a white breast, and seems dark-brown above, with a white spot on the side of the head, not reaching to the out side, from base of mandibles, and another, perhaps, on the end of the wing, with some black there. . . .I think it is the smallest duck I ever saw.); and note to September 27, 1860 ("Looking up, I see a little dipper . . in the middle of the river. . .. I sit down and watch it . . . . soon the dipper is thus tolled along to within twenty feet of where I sit, and I can watch it at my leisure. It has a dark bill and considerable white on the sides of the head or neck, with black between it, no tufts, and no observable white on back or tail.") See also A Book of the Seasons, by Henry Thoreau, The Little Dipper

I hear a chip-bird. See April 9, 1853("The chipping sparrow, with its ashy-white breast and white streak over eye and undivided chestnut crown, holds up its head and pours forth its che che che che che che. " ); April 17, 1860 ("It perches on a cherry tree, perchance, near the house, and unseen, by its steady che-che-che-che-che che, affecting us often without our distinctly hearing it, it blends all the other and previous sounds of the season together. It invites us to walk in the yard and inspect the springing plants."") See also A Book of the Seasons, by Henry Thoreau The Chipping Sparrow (Fringilla socialis).)