A History of North American Birds, Land Birds. Volume 2. Robert Ridgway
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Название: A History of North American Birds, Land Birds. Volume 2

Автор: Robert Ridgway

Издательство: Public Domain

Жанр: Биология

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СКАЧАТЬ or of a chimney, where it chants its peculiar and charming song for quite a space of time. Its song consists of a repetition of short notes, at first loud and rapid, but gradually less frequent, and becoming less and less distinct. It sings with equal animation both in May and July, and its song may be occasionally heard even into August, and not less during the noonday heat of summer than in the cool of the morning. Nuttall describes its animated song as a lively strain, composed of a repetition of short notes. The most common of its vocal expressions sounds like tshe-tshe-tshe, repeated several times. While the female is engaged in the cares of incubation, or just as the brood has appeared, the song of the male is said to be much shortened. In the village of Cambridge, Nuttall observed one of this species regularly chanting its song from the point of a forked lightning-rod, on a very tall house.

      The Indigo Bird usually builds its nest in the centre of a low thick bush. The first nest I ever met with was built in a thick sumach that had grown up at the bottom of a deep excavation, some fifteen feet below the surface, and but two feet above the base of the shrub. This same nest was occupied five successive summers. It was almost wholly built of matting that the birds had evidently taken from the ties of our grapevines. Each year the nest was repaired with the same material. Once only they had two broods in one season. The second brood was not hatched out until September, and the family was not ready to migrate until after nearly all its kindred had assembled and gone. This nest, though principally made of bare matting, was very neatly and thoroughly lined with hair. Other nests are made of coarse grasses and sedges, and all are usually lined in a similar manner.

      Audubon and Wilson describe the eggs of this bird as blue, with purplish spots at the larger end. All that I have ever seen are white, with a slight tinge of greenish or blue, and unspotted. I have never been able to meet with a spotted egg of this bird, the identification of which was beyond suspicion. They are of a rounded-oval shape, one side is only a little more pointed than the other. They measure .75 of an inch in length by .58 in breadth. They resemble the eggs of C. amœna, but are smaller, and are not so deeply tinged with blue.

Cyanospiza amœna, BairdLAZULI FINCH

      Emberiza amœna, Say, Long’s Exped. II, 1823, 47. Fringilla (Spiza) amœna, Bonap. Am. Orn. I, 1825, 61, pl. vi, f. 5. Fringilla amœna, Aud. Orn. Biog. V, 1839, 64, 230, pls. cccxcviii and ccccxxiv. Spiza amœna, Bonap. List, 1838.—Aud. Syn. 1839, 109.—Ib. Birds Am. III, 1841, 100, pl. clxxi.—Max. Cab. Jour. VI, 1858, 283.—Heerm. X, s, 46. Cyanospiza amœna, Baird, Birds N. Am. 1858, 504.—Cooper & Suckley, 205.—Cooper, Orn. Cal. 1, 233.

Illustration: Cyanospiza amœna

      Cyanospiza amœna.

      Sp. Char. Male. Upper parts generally, with the head and neck all round, greenish-blue; the interscapular region darker. Upper part of breast pale brownish-chestnut extending along the sides and separated from the blue of the throat by a faint white crescent; rest of under parts and axillars white. A white patch on the middle wing-coverts, and an obscurely indicated white band across the ends of the greater coverts. Loral region black. Length, about 5.50; wing, 3.90; tail, 2.60.

      Female. Brown above, tinged with blue on rump and tail; whitish beneath, tinged with buff on the breast and throat; faint white bands on wings.

      Hab. High Central Plains to the Pacific.

      This species is about the size of C. cyanea; the bill exactly similar. The females of the two species are scarcely distinguishable, except by the faint traces of one or two white bands on the wings in amœna. Sometimes both the throat and the upper part of the breast are tinged with pale brownish-buff.

      Habits. The Lazuli Finch was first obtained by Mr. Say, who met with it in Long’s expedition. It was observed, though rarely, along the banks of the Arkansas River during the summer months, as far as the base of the Rocky Mountains. It was said to frequent the bushy valleys, keeping much in the grass, after its food, and seldom alighting on either trees or shrubs.

      Townsend, who found this rather a common bird on the Columbia, regarded it as shy and retiring in its habits, the female being very rarely seen. It possesses lively and pleasing powers of song, which it pours forth from the upper branches of low trees. Its nests were usually found placed in willows along the margins of streams, and were composed of small sticks, fine grasses, and buffalo-hair.

      Mr. Nuttall found the nest of this bird fastened between the stem and two branches of a large fern. It was funnel-shaped, being six inches in height and three in breadth.

      This bird possibly occurs quite rarely, as far east as the Mississippi, as I have what is said to be its egg taken from a nest near St. Louis. It only becomes abundant on the plains. Mr. Ridgway found it very generally distributed throughout his route, inhabiting all the bushy localities in the fertile districts. He regarded it as, in nearly every respect, the exact counterpart of the eastern C. cyanea. The notes of the two birds are so exactly the same that their song would be undistinguishable but for the fact that in the amœna it is appreciably weaker. He found their nests usually in the low limbs of trees, near their extremity, and only a few feet from the ground. Mr. J. A. Allen found this species common in Colorado, more so among the foot-hills than on the plains, but does not appear to have met with it in Kansas.

      This species, Mr. Lord states, visits Vancouver Island and British Columbia early in the summer, arriving at the island in May, and rather later east of the Cascades. The song of the male is said to be feeble, and only now and then indulged in, as if to cheer his more sombre partner during incubation. The nest, he adds, is round and open at the top, composed of various materials worked together, lined with hair, and placed in a low bush, usually by the side of a stream.

      The Lazuli Finch was met with in large numbers, and many of their nests procured, by Mr. Xantus, in the neighborhood of Ft. Tejon, California. Indeed, it is a very abundant species generally on the Pacific coast, and is found at least as far north as Puget Sound, during the summer. It arrives at San Diego, according to Dr. Cooper, about April 22, and remains there until October. A male bird, kept in a cage over winter, was found to retain its blue plumage. It is a favorite cage-bird in California, where it is absurdly known as the Indigo Bird. During the summer months, according to Dr. Cooper, there is hardly a grove in the more open portions of the State uninhabited by one or more pairs of this beautiful species. Although the female is very shy and difficult to obtain, except on the nest, the male is not timid, and frequently sings his lively notes from the top of some bush or tree, continuing musical in all weathers and throughout the summer. He describes its song as unvaried, as rather monotonous, and closely resembling that of C. cyanea.

      Their nest, he adds, is usually built in a bush, not more than three or four feet from the ground, formed of fibrous roots, strips of bark, and grass, with a lining of vegetable down or hair, and securely bound to the surrounding branches. The eggs, five in number, he describes as white, faintly tinged with blue. At Santa Barbara he found them freshly laid May 6.

      These birds are never gregarious, though the males come in considerable flocks in the spring, several days before the females. They travel at night, arriving at Santa Cruz about April 12. A nest found by Dr. Cooper, May 7, in a low bush close to a public road, was about three feet from the ground. It was very strongly built, supported by a triple fork of the branch, and was composed of blades of grass firmly interwoven, and lined with horsehair and cobwebs. It measured three inches in height and three and three fourths in width. The cavity was two inches deep and one and three fourths wide.

      In Arizona Dr. Coues found this bird a summer resident, but not abundant.

      At Puget Sound this bird arrives about May 15. Dr. Suckley states that in Oregon it was observed returning from the south, in large flocks, in one instance of several hundred individuals.

      The eggs of the Lazuli, when fresh, are of a light blue, СКАЧАТЬ