Both the pink and the green are phenomena of the morning.

February 20.

 P. M. – I see directly in front [of] the Depot Lee [?] house, on the only piece of bare ground I see hereabouts, a large flock of lesser redpolls feeding. They must be picking up earth, sand, or the withered grass. They are so intent on it that they allow me to come quite near This, then is one use for the drifting of snow which lays bare some spots, however deep it may be elsewhere, — so that the birds, etc., can come at the earth. I never thought of this use before. 

First the snow fell deep and level on the 18th, then, the 19th, came high wind and plowed it out here and there to the ground; and so it will always be in some places, however deep it may have been. 

J. Farmer tells me that his grandfather once, when moving some rocks in the winter, found a striped squirrel frozen stiff. He put him in his pocket, and when he got home laid him on the hearth, and after a while he was surprised to see him running about the room as lively as ever he was. 

I notice a very pale pink reflection from snowy roofs and sides of white houses at sunrise. So both the pink and the green are phenomena of the morning, but in a much less degree, which shows that they depend more on the twilight and the grossness of the atmosphere than on the angle at which the sunlight falls.

H. D. Thoreau, Journal, February 20, 1860

A large flock of lesser redpolls feeding. See February 12, 1860 ("On the east side of the pond, under the steep bank, I see a single lesser redpoll picking the seeds out of the alder catkins, and uttering a faint mewing note from time to time on account of me, only ten feet off. It has a crimson or purple front and breast.") See also A Book of the Seasons, by Henry Thoreau, the lesser redpoll.

The snow fell deep and level on the 18th, then, the 19th, came high wind and plowed it out here  See February 19, 1860 ("Snow maybe near a foot deep, and now drifting.")

Both the pink and the green are phenomena of the morning, but in a much less degree. See notes to January 31, 1859 ("Also the pink light reflected from the low, flat snowy surfaces amid the ice on the meadows, just before sunset, is a constant phenomenon these clear winter days. . . .Perhaps the green seen at the same time in ice and water is produced by the general yellow or amber light of this hour, mingled with the blue of the reflected sky."); and   December 29, 1859 ("I went to the river immediately after sunrise. I could [see] a little greenness in the ice, and also a little rose-color from the snow, but far less than before the sun set. Do both these phenomena require a gross atmosphere? . . .To-night I notice the rose-color in the snow and the green in the ice at the same time, having been looking out for them. ")