A History of North American Birds, Land Birds. Volume 1. Robert Ridgway

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СКАЧАТЬ Texas Thrasher appears to belong only to the Avifauna of the Southwest. It first appears as a bird of the valley of the Rio Grande, and extends from thence southward through Eastern Mexico to Cordova and Orizaba. In Arizona it is replaced by H. palmeri, H. lecontei, and H. crissalis, in California by H. redivivus, and at Cape St. Lucas by H. cinereus, while in the United States east of the Rocky Mountains it is represented by its nearer ally H. rufus.

      Habits. The eggs of this species are hardly distinguishable from those of the common Brown Thrasher (H. rufus), of the Atlantic States. The color of their ground is a greenish-white, which is thickly, and usually completely, covered with fine markings of a yellowish-brown. They have an average length of 1.13 inches, by .79 in breadth. So far as I have had an opportunity of observing, they do not vary from these measurements more than two per cent in length or one per cent in breadth. Their nests are usually a mere platform of small sticks or coarse stems, with little or no depression or rim, and are placed in low bushes, usually above the upper branches.

      In regard to the distinctive habits of this species I have no information.

Harporhynchus cinereus, XantusCAPE ST. LUCAS THRASHER

      Harporhynchus cinereus, Xantus, Pr. A. N. Sc. 1859, 298.—Baird, Ib., 303; Review, 46.—Sclater, Catal. 1861, 8, No. 49.—Elliot, Illust., I. pl. i.—Cooper, Birds Cal. 1, 19.

      Sp. Char. Bill as long as the head; all the lateral outlines gently decurved from the base. Bristles not very conspicuous, but reaching to the nostrils. Wings considerably shorter than the tail, much rounded. First primary broad, nearly half the length of the second; the third to the seventh quills nearly equal, their tips forming the outline of a gentle curve; the second quill shorter than the ninth. Tail considerably graduated, the lateral feathers more than an inch the shorter. Legs stout; tarsi longer than middle toe, distinctly scutellate, with seven scales.

      Above ashy brown, with perhaps a tinge of rusty on the rump; beneath fulvous-white, more fulvous on the flanks, inside of wing, and crissum. Beneath, except chin, throat, and from middle of abdomen to crissum, with well-defined V-shaped spots of dark brown at the ends of the feathers, largest across the breast. Loral region hoary. Wings with two narrow whitish bands across the tips of greater and middle coverts; the quills edged externally with paler. Outer three tail-feathers with a rather obsolete white patch in the end of inner web, and across the tips of the outer.

      Spring specimens are of rather purer white beneath, with the spots more distinct than as described.

      Length of 12,960 (skin), 10.00; wing, 4.10; tail, 4.65; first primary, 1.60; second, 2.50; bill from gape, 1.40, from above, 1.15, from nostril, .90; tarsus, 1.26; middle toe and claw, 1.12; claw alone, .30.

      Hab. Cape St. Lucas, Lower California.

      This species is curiously similar in coloration to Oreoscoptes montanus, from which its much larger size, much longer and decurved bill, and the graduated tail, of course readily distinguish it. It agrees in some respects with H. rufus and H. longirostris, but is smaller, the bill longer and more curved; the upper parts are ashy olivaceous-brown instead of rufous, etc.

      Habits. So far as is at present known in regard to this species it appears to be confined exclusively to the peninsula of Lower California. It has, at least, been met with nowhere else. Mr. Xantus found it quite numerous in the vicinity of Cape St. Lucas, in a region which, as he describes it, was singularly unpropitious. This was a sandy shore, extending about a quarter of a mile inland, whence a cactus desert stretched about six miles up to a high range of mountains. Throughout this tract the ground is covered with a saline efflorescence. There is no fresh water within twenty-eight miles.

      Mr. Xantus speaks of the habits of this bird as being similar to those of the Oreoscoptes montanus. It was a very abundant species at this cape, where he found it breeding among the cactus plants in large numbers. He mentions that as early as the date of his arrival at the place, April 4, he found them already with full-fledged young, and states that they continued to breed until the middle of July.

      He was of the impression that the eggs of this species more nearly resemble those of the common Mocking-Bird than any others of this genus. The aggravatingly brief notes that accompanied his collections show that the general position of the nest of this species was on low trees, shrubs, and most usually, cactus plants, and in no instance at a greater elevation from the ground than four feet. Their nests were flat structures, having only a very slight depression in or near their centre. They were about 5 inches in diameter, and were very little more than a mere platform.

      The eggs vary somewhat in their ground color, but exhibit only slight variations in size or shape. Their greatest length is 1.13 inches, and their average 1.12 inches. Their mean breadth is .77 inch, and their maximum .79 inch. The ground color is a greenish-white, profusely marked with spots of mingled purple and brown. In others the ground color is a bluish-green. In some specimens the spots are of a yellowish-brown, and in some the markings are much lighter.

Harporhynchus curvirostris, CabanGRAY CURVE-BILL THRASHER

      Orpheus curvirostris, Swainson, Philos. Mag. 1827, 369 (Eastern Mexico).—M’Call, Pr. A. N. Sc. May, 1848, 63. Mimus curvirostris, Gray, Genera, 1844-49. Toxostoma curvirostris, Bonap. Conspectus, 1850, 277.—Sclater, P. Z. S. 1857, 212. Harporhynchus curvirostris, Cab. Mus. Hein. I. 1850, 81.—Baird, Birds N. Am. 1858, 351, pl. li.; Ib. Rev. 45.—Heermann, P. R. R. Rep. X, Parke’s Rep. 1859, 11.—Sclater, P. Z. S. 1859, 339; Ib. Catal. 1861, 7, No. 46.—Dresser, Ibis, 1865, 483. Pomatorhinus turdinus, Temm. Pl. Col. 441. ? Toxostoma vetula, Wagler, Isis, 1831, 528.

      Sp. Char. Exposed portion of the bill about as long as the head; considerably decurved. Above uniform grayish-brown, or light ash; beneath dull white; the anal region and under tail-coverts tinged with brownish-yellow. The under parts generally, except the chin, throat, middle of the belly, and under coverts, with rounded sub-triangular, quite well-defined spots, much like the back. These are quite confluent on the breast. Two narrow bands on the wing-coverts, and the edges of primaries and alulæ, are white. The tail-feathers, except the middle, are conspicuously tipped with white. Length of female, 10 inches; wing, 4.00; tail, 4.55; tarsus, 1.20.

      Hab. Adjacent regions of United States and Mexico, southward. Cordova, Orizaba, Mirador; Mazatlan, Colima, Oaxaca.

      Specimens from the Rio Grande across to Mazatlan represent one species; but those from the latter locality are somewhat darker in colors, though this may be owing, in part, to the fact that they are winter birds. Considerable differences in proportions may often be noticed between individuals, but nothing strikingly characteristic of any particular region.

      The specimens of the Mazatlan series (37,326 ♂, 51,523, and 51,525 ♂) have tails considerably longer than any of those from the Rio Grande, the excess amounting in the longest to nearly an inch; but one from the same locality has it shorter than any of the Texas specimens.

      In its perfect plumage, this species has both rows of coverts distinctly tipped with white; but in the faded condition of midsummer, the bands thus produced are hardly discernible, and the spots below become very obsolete.

      Habits. This interesting species appears to be common in Western Texas, the valley of the Rio Grande, and Western Mexico. It was met with in these regions on the several railroad surveys, and is described by Dr. Heermann as possessing musical powers surpassed by few other birds. When alarmed it immediately hides itself in a thick covert of underbrush, whence it is almost impossible to dislodge it. Its food consists of fruit and berries when in their season, of insects and their larvæ, and of worms. These it collects both among the trees and from the ground, on the latter of which it spends much of its time. Mr. J. H. Clark states that the nest of this bird is very similar to that of the Mocking-Bird, but is finer and much more СКАЧАТЬ