Yet some birds will take not a little risk, depending on their quickness of eye and nimbleness of wing to escape their predatory foes. In a tall sycamore tree standing alone at the fringe of a piece of woodland, sparrow hawks, red-breasted woodpeckers, and nuthatches, a pair of each, had set up their household gods. The tree was still bare of foliage, for it had few branches, and the season was early spring. It was evident, too, that the hawks were watching for an opportunity to assault their neighbors, to whom they often gave chase. Yet the woodpeckers had in some way contrived to hew out their arboreal nursery, which was almost, if not quite, finished. It was a freshly chiseled cavity, as could be seen plainly from below. The mother nuthatch was feeding her young. She would fly to the tree with an insect in her bill, calling "Yank, yank," or "Ha-ha, ha-ha," as if to announce her arrival, then glide around the branch, scurry down its sloping wall, swing to the underside where the nest hole was, and jab the juicy morsel into the chirruping throat of one of the bantlings within. The bloodthirsty hawk dashed at her several times, but she deftly dodged around to the other side of the branch, and let him glide harmlessly by, flinging after him a taunting "Ha-ha, ha-ha," as much as to say, "Missed your aim again, didn't you!" However, it was a pretty picture the nuthatch made, holding in her bill a large beetle with silvery wings, sometimes holding it straight out from the bark as she glanced around to see whether the coast was clear and at the same time calling her nasal "yank," so full of woodsy suggestion. A trying experience for many birds comes at bedtime. They grow quite nervous as night begins to settle over the land, some of them chirping loudly to express their solicitude. As the darkness deepens, their sight becomes obscured, and they seem to realize that they are exposed to dangers unseen. You have often, no doubt, noticed the to-do made by the robins as the time for retiring draws near. What foes may be lurking in the growing darkness they know not. A favorite roosting place for the sparrows, towhees, juncos, and even the robins, was in some thickets by the roadside. As I passed along, a bird would occasionally leap from his perch to the ground and go galloping away over the rustling leaves. At one place a half dozen Harris sparrows were chirping loudly and flitting about a couple of small trees, which were partly covered with a thick network of vines. The cause of their uneasiness could not be determined, unless it was their natural fear of the darkness. I waited until night had settled. Presently the sparrows became quiet. Tramping about near the trees did not disturb them, but when I flung a lighted stick against one of the trees, they flew out of their matted bedroom with loud outcries. For a few minutes they could be seen dashing about from tree to tree; then they settled down for the night.