A History of North American Birds, Land Birds. Volume 1. Robert Ridgway. Читать онлайн. Newlib. NEWLIB.NET

Автор: Robert Ridgway
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Ridgway describes the Dipper as remarkably quick, as well as odd, in its movements,—whether walking in the shallow bed of the stream, or standing on a stone along the edge, continually tilting up and down, now chattering as it flies rapidly along the stream, again alighting into the water, in which it wades with the greatest facility. Its flight is remarkably swift and well sustained, and in manner is very unusual, the bird propelling itself by a rapid buzzing of the wings, following in its flight every undulation in the course of the stream into which it drops suddenly. Its song is described as remarkably sweet and lively, in modulation resembling somewhat that of the Harporhynchus rufus, but less powerful, though sweeter in effect.

      Dr. E. Baldamus, of Halle, who possesses specimens of the eggs of this species, describes them as pure white in color, oval in shape, and hardly distinguishable from those of the European C. aquaticus.

      A nest of this bird obtained by Mr. J. Stevenson, of Hayden’s Expedition, in Berthoud’s Pass, Colorado, is a hemisphere of very uniform contour built on a rock, on the edge of a stream. Externally it was composed of green moss, in a living state; within is a strong, compactly built apartment, arched over, and supported by twigs, with a cup-like depression at the bottom, hemispherical and composed of roots and twigs firmly bound together. The structure is 7 inches in height externally, and has a diameter of 10½ inches at the base. Within, the cavity has a depth of 6 inches; the entrance, which is on one side, is 3½ in breadth by 2½ in height. The eggs were three in number, uniform, dull white, and unspotted. They measure 1.04 inches by .70. They have an elongated oval shape, and are much pointed at one end.

      Family SAXICOLIDÆ.—The Saxicolas

      The general characters of this family have already been given on p. 2, as distinguished from the Turdidæ. The relationships are very close, however, and but little violence would be done by making it a subfamily of Turdidæ or even a group of Turdinæ, as was done in the “Birds of North America.”

      While the group is very well represented in the Old World, America has but one peculiar genus Sialia, and another Saxicola, represented by a single species, a straggler, perhaps, from Greenland on the one side and Siberia on the other. The diagnostic characters of these are as follows, including Turdus to show the relationships of the three genera:—

      Turdus. Tarsi long, exceeding the middle toe; wings reaching to the middle of the tail, which is about four fifths the length of the wings. Bill stout; its upper outline convex toward the base. Second quill shorter than fifth.

      Saxicola. Tarsi considerably longer than the middle toe, which reaches nearly to the tip of the tail. Tail short, even; two thirds as long as the lengthened wings, which reach beyond the middle of the tail. Second quill longer than fifth. Bill attenuated; its upper outline concave towards the base.

      Sialia. Tarsi short; about equal to the middle toe. Wings reaching beyond the middle of the tail. Bill thickened.

Genus SAXICOLA, Bechstein

      Saxicola, Bechstein, Gemeinnützige Naturg. 1802. (Type, S. œnanthe.)

Saxicola œnanthe

      Saxicola œnanthe, Bechst.

      18075

      Gen. Char. Commissure slightly curved to the well-notched tip. Culmen concave for the basal half, then gently decurving. Gonys straight. Bill slender, attenuated; more than half the length of head. Tail short, broad, even. Legs considerably longer than the head; when outstretched reaching nearly to the tip of tail. Third quill longest; second but little shorter. Claws long, slightly curved; hind toe rather elongated.

      As already stated, America possesses but a single member of this group of birds, so well represented in the Old World. The color is bluish-gray, with wings, a stripe through the eye, and the middle of exposed tail-feathers black.

Saxicola œnanthe, BechstTHE WHEAT-EAR

      Motacilla œnanthe, Linn. Syst. Nat. I, 1758, 186. Saxicola œnanthe, Bechst. “Gemein. Naturg. 1802,” and of European authors.—Holböll, Orn. Grœn. (Paulsen ed.), 1846, 23 (Greenland).—Baird, Birds N. Am. 1858, 220 (Europe); Review, 61.—Jones, Nat. Bermuda, 1859, 28 (Bermuda).—Coues, Pr. A. N. S. 1861, 218 (Labrador).—Reinhardt, Ibis, 1861, 5 (Greenland).—Dall & Bannister (Alaska). Saxicola œnanthoides, Vigors, Zoöl. Blossom, 1839, 19 (N. W. America).—Cassin, Ill. I, 1854, 208, pl. xxxiv (Nova Scotia).

      Sp. Char. (Description from European specimen.) Male in spring, forehead, line over the eye, and under parts generally white; the latter tinged with pale yellowish-brown, especially on the breast and throat. A stripe from the bill through, below, and behind the eye, with the wings, upper tail-coverts, bill and feet, black. Tail white, with an abrupt band of black (about .60 of an inch long) at the end, this color extending further up on the middle feather. Rest of upper parts ash-gray; quills and greater coverts slightly edged with whitish. Length, 6.00; wing, 3.45; tail, 2.50; tarsus, 1.05.

      Autumnal males are tinged with rusty; the black markings brown. The female in spring is reddish-gray; lores and cheeks brown; the black markings generally brownish, and not well defined. Eggs pale light blue. Nest on ground.

      Hab. An Old World species (Europe, Northern Africa, and Asia), abundant in Greenland, found probably as an autumnal migrant in Labrador, Canada, Nova Scotia, Bermuda, etc. Occurs also on Norton Sound, near Behring’s Straits. Very occasional in the Eastern States: Long Island.

Saxicola œnanthe

      Saxicola œnanthe.

      This bird appears to be abundant in Norton Sound, from which region Mr. Dall has recently brought specimens in full spring plumage. These are decidedly smaller than birds from Labrador and Greenland, but not distinguishable, and seem to agree precisely with skins from Central Europe.

      Habits. The well-known Wheat-ear is entitled to a place in our fauna, not only as an accidental visitor, but also as an occasional resident. Dr. H. R. Storer, of Boston, found them breeding in Labrador in the summer of 1848, and procured specimens of the young birds which were fully identified by Dr. Samuel Cabot as belonging to this species. In the following year Andrew Downs, of Halifax, gave me the specimen described and figured by Mr. Cassin. This was secured late in the summer near Cape Harrison, Labrador, where it had evidently just reared its brood. In 1860 Mr. Elliott Coues obtained another specimen on the 25th of August, at Henley Harbor. It was in company with two others, and was in immature plumage. Its occurrence in considerable numbers on the coast of Labrador is further confirmed by a writer (“W. C.”) in “The Field,” for June 10, 1871, who states that when in that region during the months of May and June he saw a number of “White Ears,” the greater proportion of them being males. He inferred from this that they breed in that country, the apparent scarcity of females being due to their occupation in nesting. Mr. Lawrence has one in his cabinet from Long Island, and the Smithsonian Institution one from Quebec. Specimens have also been obtained in the Bermudas.

      Holböll, in his paper on the fauna of Greenland, is of the opinion that the individuals of this species that occur there come from Europe, make their journey across the Atlantic without touching at Iceland, and arrive in South Greenland as early in the season as it does at the former place, the first of May. It reaches Godhaven a month later, at times when all is snowbound and the warmth has not yet released the insects on which it feeds. It is found as far north as the 73d parallel, and even beyond. In September it puts on its winter dress and departs.

      Mr. Dall states that several large flocks of this species were seen at Nulato, May 23 and 24, 1868, and a number of specimens obtained. They were said to be abundant on the dry stony hill-tops, but were rare along the river.

      The Wheat-ear is one of the most common birds of Europe, and is found, at different seasons, throughout that continent as well as in a large portion of Western Asia. It breeds throughout the British Islands as well as in the whole of Northern Europe and Asia.

      Its food is principally worms and insects, the latter of which it takes upon