A History of North American Birds, Land Birds. Volume 1. Robert Ridgway
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Название: A History of North American Birds, Land Birds. Volume 1
Автор: Robert Ridgway
Издательство: Public Domain
Жанр: Биология
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Dr. Cooper found this species quite common at Fort Mojave, but so very shy that he only succeeded in shooting one, after much watching for it. Their song, general habits, and nest he speaks of as being in every way similar to those of H. redivivus.
The eggs remained unknown until Dr. E. Palmer had the good fortune to find them at St. George, Southern Utah, June 8, 1870. The nest was an oblong flat structure, containing only a very slight depression. It was very rudely constructed externally of coarse sticks quite loosely put together; the inner nest is made of finer materials of the same. The base of this nest was 12 inches long, and 7 in breadth; the inner nest is circular, with a diameter of 4½ inches.
The eggs are of an oblong-oval shape, one end being a little less obtuse than the other. In length they vary from 1.15 to 1.12 inches, and in breadth from .84 to .82 of an inch. They are of a uniform blue color, similar to the eggs of the common Robin (Turdus migratorius), only a little paler or of a lighter tint. In the total absence of markings they differ remarkably from those of all other species of the genus.
Mimus, Boie, Isis, Oct. 1826, 972. (Type Turdus polyglottus, Linn.)
Orpheus, Swainson, Zoöl. Jour. III, 1827, 167. (Same type.)
Mimus polyglottus.
8159
Gen. Char. Bill not much more than half the length of the head; gently decurved from the base, notched at tip; commissure curved. Gonys straight, or slightly concave. Rictal bristles quite well developed. Wings rather shorter than the tail. First primary about equal to, or rather more than, half the second; third, fourth, and fifth quills nearly equal, sixth scarcely shorter. Tail considerably graduated; the feathers stiff, rather narrow, especially the outer webs, lateral feathers about three quarters of an inch the shorter in the type. Tarsi longer than middle toe and claw by rather less than an additional claw; tarsi conspicuously and strongly scutellate; broad plates seven.
Of this genus there are many species in America, although but one occurs within the limits of the United States.
The single North American species M. polyglottus is ashy brown above, white beneath; wings and tail black, the former much varied with white.
Turdus polyglottus, Linn. Syst. Nat. 10th ed. 1758, 169; 12th ed. 1766, 293.—Mimus polyglottus, Boie, Isis, 1826, 972.—Sclater, P. Z. S. 1856, 212.—Ib. 1859, 340.—Ib. Catal. 1861, 8, No. 51.—Baird, Birds N. Am. 1858, 344.—Ib. Rev. 48.—Samuels, 167.—Cooper, Birds Cal. 1, 21.—Gundlach, Repertorio, 1865, 230 (Cuba).—Dresser, Ibis, 1865, 230.—Coues, Pr. A. N. Sc. 1866, 65 (Arizona).—? Orpheus leucopterus, Vigors, Zoöl. Beechey, 1839.
Figures: Wilson, Am. Orn. II, 1810, pl. x, fig. 1.—Aud. Orn. Biog. I, 1831, pl. xxi.—Ib. Birds Amer. II, 1841, pl. 137.
Sp. Char. Third and fourth quills longest; second about equal to eighth; the first half or more than half the second. Tail considerably graduated. Above ashy brown, the feathers very obsoletely darker centrally, and towards the light plumbeous downy basal portion (scarcely appreciable, except when the feathers are lifted). The under parts are white, with a faint brownish tinge, except on the chin, and with a shade of ash across the breast. There is a pale superciliary stripe, but the lores are dusky. The wings and tail are dark brown, nearly black, except the lesser wing-coverts, which are like the back; the middle and greater tipped with white, forming two bands; the basal portion of the primaries white; most extended on the inner primaries. The outer tail-feather is white, sometimes a little mottled; the second is mostly white, except on the outer web and towards the base; the third with a white spot on the end; the rest, except the middle, very slightly or not at all tipped with white. The bill and legs are black. Length, 9.50; wing, 4.50; tail, 5.00.
Mimus polyglottus.
Young. Similar, but distinctly spotted with dusky on the breast, and obsoletely on the back.
Hab. North America, from about 40° (rare in Massachusetts, Samuels), south to Mexico. Said to occur in Cuba.
The Mocking-Birds are closely allied, requiring careful comparison to distinguish them. A near ally is M. orpheus, of Jamaica, but in this the outer feather is white, and the 2d, 3d, and 4th tail-feathers are marked like the 1st, 2d, and 3d of polyglottus, respectively.
We have examined one hundred and fourteen specimens, of the present species, the series embracing large numbers from Florida, the Rio Grande, Cape St. Lucas, and Mazatlan, and numerous specimens from intermediate localities. The slight degree of variation manifested in this immense series is really surprising; we can discover no difference of color that does not depend on age, sex, season, or the individual (though the variations of the latter kind are exceedingly rare, and when noticed, very slight). Although the average of Western specimens have slightly longer tails than Eastern, a Florida example (No. 54,850, ♂, Enterprise, Feb. 19), has a tail as long as that of the longest-tailed Western one (No. 8,165, Fort Yuma, Gila River, Dec.). Specimens from Colima, Mirador, Orizaba, and Mazatlan are quite identical with Northern ones.
Habits. The Mocking-Bird is distributed on the Atlantic coast, from Massachusetts to Florida, and is also found to the Pacific. On the latter coast it exhibits certain variations in forms, but hardly enough to separate it as a distinct species. It is by no means a common bird in New England, but instances of its breeding as far north as Springfield, Mass., are of constant occurrence, and a single individual was seen by Mr. Boardman near Calais, Me. It is met with every year, more or less frequently, on Long Island, and is more common, but by no means abundant, in New Jersey. It is found abundantly in every Southern State, and throughout Mexico. It has also been taken near Grinnell, Iowa.
A warm climate, a low country, and the vicinity of the sea appear to be most congenial to their nature. Wilson found them less numerous west of the Alleghany than on the eastern side, in the same parallels. Throughout the winter he met with them in the Southern States, feeding on the berries of the red cedar, myrtle, holly, etc., with which the swampy thickets abounded. They feed also upon winged insects, which they are very expert in catching. In Louisiana they remain throughout the entire year, approaching farmhouses and plantations in the winter, and living about the gardens and outhouses. They may be frequently seen perched upon the roofs of houses and on the chimney-tops, and are always full of life and animation. When the weather is mild the old males may be heard singing with as much spirit as in the spring or summer. They are much more familiar than in the more northern States. In Georgia they do not begin to sing until February.
The vocal powers of the Mocking-Bird exceed, both in their imitative notes and in their natural song, those of any other species. Their voice is full, strong, and musical, and capable of an almost endless variation in modulation. The wild scream of the Eagle and the soft notes of the Bluebird are repeated with exactness and with apparently equal facility, while both in force and sweetness the Mocking-Bird will often improve upon the original.
The song of the Mocking-Bird is not altogether imitative. His natural notes are bold, rich, and full, and are varied almost without limitation. They are frequently interspersed with imitations, and both are uttered with a rapidity and emphasis that can hardly be equalled.
The Mocking-Bird readily becomes accustomed to confinement, and loses little of the power, energy, or variety of its song, but often much of its sweetness in a domesticated state. СКАЧАТЬ