Mr. Nuttall, who dwells with much force upon the beauty and earnestness of expression of the song of this species, has also noticed and remarked upon the power of individuals to vary their song, from time to time, with very agreeable effect, but no one has recorded so remarkable an instance as that thus carefully noted by Mr. Paine.
These birds are found in almost any cultivated locality where the grounds are sufficiently open. They prefer the edges of open fields, and those of meadows and low grounds, but are rarely found in woods or in thick bushes, except near their outer edges. They nest naturally on the ground, and in such situations a large majority build their nests. These are usually the younger birds. A portion, almost always birds of several summers, probably taught by sad experiences of the insecurity of the ground, build in bushes. A pair which had a nest in an adjoining field had been robbed, by a cat, of their young when just about to fly. After much lamentation, and an interval of a
week, I found this same pair, which I easily recognized, building their nest among some vines near my house, some eight feet from the ground. They had abandoned my neighbor’s grounds and taken refuge close to my house. This situation they resorted to afterwards for several successive summers, each season building two nests, never using the same nest a second time, although each time it was left as clean and in as good condition as when first made. Indeed, this species is remarkable for its cleanliness, both in its own person and in its care of nestlings and nests.
They feed their young chiefly with insects, especially small caterpillars; the destructive canker-worm is one of their favorite articles of food, also the larvæ of insects and the smaller moths. When crumbs of bread are given them, they are eagerly gathered and taken to their nests.
In the Middle States they are said to have three broods in a season. This may also be so in New England, but I have never known one pair to have more than two broods in the same summer, even when both had been successfully reared. Nests found after July have always been in cases where some accident had befallen the preceding brood.
The nest of the Song Sparrow, whether built on ground, bush, or tree, is always well and thoroughly made. Externally and at the base it consists of stout stems of grasses, fibrous twigs of plants, and small sticks and rootlets. These are strongly wrought together. Within is made a neat, well-woven basket of fine long stems of grasses, rarely anything else. On the ground they are usually concealed beneath a tuft of grass; sometimes they make a covered passage-way of several inches, leading to their nest. When built in a tree or shrub, the top is often sheltered by the branches or by dry leaves, forming a covering to the structure.
The eggs of the Song Sparrow are five in number, and have an average measurement of .82 by .60 of an inch. They have a ground of a clay-color or dirty white, and are spotted equally over the entire egg with blotches of a rusty-brown, intermingled with lighter shades of purple. In some these markings are so numerous and confluent as to entirely conceal the ground-color; in others they are irregularly diffused over different parts, leaving patches unmarked. Occasionally the eggs are unspotted, and are then not unlike those of Leucosticte griseinucha.
Melospiza melodia, var. fallax, Baird.
WESTERN SONG SPARROW.
Zonotrichia fallax, Baird, Pr. A. N. Sc. Ph. VII, June, 1854, 119 (Pueblo Creek, New Mexico). ? Zonotrichia fasciata, (Gm.) Gambel, J. A. N. Sc. Ph. 2d Series, I, 1847, 49. Melospiza fallax, Baird, Birds N. Am. 1858, 481, pl. xxvii, f. 2.—Kennerly, P. R. R. X, b. pl. xxvii, f. 2.—Cooper, Orn. Cal. 1, 215.