Thoreau writes in his journal:
Carried my owl to the hill again. Had to shake him out of the box, for he did not go of his own accord. He had learned to alight on his perch, and it was surprising how lightly and noiselessly he would hop upon it.) There he stood on the grass, at first bewildered, with his horns pricked up and looking toward me. In this strong light the pupils of his eyes suddenly contracted and the iris expanded till then were two great brazen orbs, with a centre spot merely. His attitude expressed astonishment more than anything. I was obliged to toss him up a little that he might feel his wings, and then he flapped away . . .
There is a wild apple on the lull which has to me a peculiarly pleasant bitter tang, not perceived till it is three quarters tasted. It remains on the tongue. As you cut it, it smells exactly like a squash-bug. I like its very acerbity. It is a sort of triumph to cat and like it, an ovation. In the fields alone are the sours and bitters of nature appreciated . . .