April has begun like itself.

April 1.

The birds sing this warm, showery day after a fortnight's cold with a universal burst and flood of melody. The tree sparrows, hyemalis, and song sparrows are particularly lively and musical in the yard this rainy and truly April day. The air rings with them. The robin now begins to sing sweet powerfully. The meadow resounds with the sprayey notes of black birds. 

April has begun like itself. It is warm and showery, while I sail away with a light southwest wind toward the Rock. The water is smooth at last and dark. Ice no longer forms on the oars. Sometimes the sun seems just ready to burst out, yet I know it will not. 

H. D. Thoreau, Journal, April 1, 1854

The birds sing this warm, showery day after a fortnight's cold with a universal burst and flood of melody. See April 2, 1852 (“The air is full of the notes of birds, - song sparrows, red-wings, robins (singing a strain), bluebirds, - and I hear also a lark, - as if all the earth had burst forth into song.”)

April has begun like itself. It is warm and showery. See April 1, 1855 (The month comes in true to its reputation. . . .warm rain on the roof, and . . .the puddles shining in the road. “); April 1, 1857 (“It is a true April evening, feeling and looking as if it would rain, and already I hear a robin or two singing their evening song.”)