Part 58

HABITS. The dreaded Blue Hen Hawk, as our Goshawk is usually called in New England, is a bird of somewhat irregular occurrence south of the 44th parallel. It occurs in the vicinity of Boston from November to March, but is never very common. In other parts of the State it is at times not uncommon at this season. It is common throughout Nova Scotia, New Brunswick, and Northern Maine, and may undoubtedly be found breeding in the northern portions of New Hampshire, Vermont, and New York. In the summer of 1872, Mr. George Baxter, of Danville, Vt., procured a nest containing three young birds, which were sent to the New York Central Park. Mr. Downes speaks of it as “far too common” in the vicinity of Halifax, where it is very destructive to Ducks, Pigeons, and poultry. Mr. Boardman gives it as common near Calais, where it breeds, and where he has taken its eggs. Mr. Verrill mentions it as resident in Western Maine, where it is one of the most common Hawks. Mr. Allen found it usually rare near Springfield, but remarkably common during the winter of 1859–60. He afterwards mentions that since then, and for the last ten winters, he has known them to be quite common during several seasons. Mr. C. J. Maynard is confident that this species occasionally breed in Massachusetts. He once observed a pair at a locality in Weston, until the latter part of May. It was found breeding in Iowa by Mr. S. N. Marston. Mr. Victor Brooke records in the Ibis, 1870, p. 538, the occurrence, in Ireland, of an example of this species. It was shot in the Galtee Mountains, in February, 1870. The bird was a mature female, with the ovary somewhat enlarged. The stomach contained the remains of a rabbit.

On the Pacific coast it is comparatively rare in California, though much more abundant farther north, in Oregon and in Washington Territory. Dr. Cooper noticed several in the dense spruce forests of Washington Territory, and regarded it as a special frequenter of dark woods, where other Hawks are rarely seen. Dr. Suckley also obtained several specimens of this bird both at Fort Dalles and at Fort Steilacoom.

Sir John Richardson met with this Hawk and procured several specimens in the Arctic regions, and Captain Blakiston also met with it in the valley of the Saskatchewan. He states that it ranges throughout the interior from Hudson’s Bay to the Rocky Mountains and Mackenzie River. He found it breeding on the Saskatchewan, and one of his specimens was shot on its nest. The Goshawk was obtained at Sitka by Bischoff; and a pair was taken by Mr. Dall, April 24, 1867, within a few miles of Nulato Fort, on the Yukon River. The nest was on a large poplar, thirty feet above the ground, and made of small sticks. No eggs had been laid, but several nearly mature were found in the ovary of the female. The nest was on a small island in a thick grove of poplars, a situation which this species seemed to prefer. Mr. Dall adds that this was the most common Hawk in the valley of the Yukon, where it feeds largely on the White Ptarmigan (Lagopus albus), tearing off the skin and feathers, and eating only the flesh. Mr. Dall received skins from the Kuskoquim River, where it was said to be a resident species.

Dr. Suckley speaks of this Hawk as bold, swift, and strong, never hesitating to sweep into a poultry-yard, catch up a chicken, and make off with it almost in a breath. Its manner of seizing its prey was by a horizontal approach for a short distance, elevated but a few feet from the ground, a sudden downward sweep, and then, without stopping its flight, making its way to a neighboring tree with the struggling victim securely fastened in its talons. For strength, intrepidity, and fury, Dr. Suckley adds, it cannot be surpassed. It seems to display great cunning, seizing very opportune moments for its attacks. In one instance it was several days before he was able to have one of these birds killed, although men were constantly on the watch for it. So adroit was it in seizing opportunities to make its attacks, that it regularly visited the poultry-yard three times a day, and yet always contrived to escape unmolested. He found these birds much more plentiful during some months than at other times, and attributed it to their breeding in the retired recesses of the mountains, remaining there until their young were well able to fly, and then all descending to the open plains, where they obtain a more abundant supply of food.

Mr. Audubon states that in Maine the Goshawk was said to prey upon hares, the Canada and Ruffed Grouse, and upon Wild Ducks. They were so daring as to come to the very door of the farm-house, and carry off their prey with such rapidity as to baffle all endeavors to shoot them. Mr. Audubon found this Hawk preying upon the Wild Ducks in Canoe Creek, near Henderson, Ky., during a severe winter; as the banks were steep and high, he had them at a disadvantage, and secured a large number of them. They caught the Mallards with great ease, and, after killing them, tore off the feathers with great deliberation and neatness, eating only the flesh of the breast.

The flight of this bird he describes as both rapid and protracted, sweeping along with such speed as to enable it to seize its prey with only a slight deviation from its course, and making great use of its long tail in regulating both the direction and the rapidity of its course. It generally flies high, with a constant beat of the wings, rarely moving in large circles in the manner of other Hawks. It is described as a restless bird, vigilant and industrious, and seldom alighting except to devour its prey. When perching, it keeps itself more upright than most other Hawks.

Audubon narrates that he once observed one of these birds give chase to a large flock of the Purple Grakles, then crossing the Ohio River. The Hawk came upon them with the swiftness of an arrow; the Blackbirds, in their fright, rushing together in a compact mass. On overtaking them, it seized first one, and then another and another, giving each a death-squeeze, and then dropping it into the water. In this manner it procured five before the poor birds could reach the shelter of a wood; and then, giving up the chase, swept over the waters, picking up the fruits of its industry, and carrying each bird singly to the shore.

Mr. Audubon, who observed these Hawks in the Great Pine Forest of Pennsylvania, and on the banks of the Niagara River, near the Falls, describes a nest as placed on the branches of a tree, and near the trunk. It was of great size, and resembled that of a Crow in the manner of its construction, but was much flatter. It was made of withered twigs and coarse grass, with a lining of fibrous strips of plants resembling hemp. Another, found by Mr. Audubon in the month of April, contained three eggs ready to be hatched. In another the number was four.

Mr. Dall states that the eggs are usually four in number, of a greenish-white color, and were usually all laid by the first of May. An egg of this bird, obtained by Mr. Dall at Nulato, April 27, 1858, measures 2.28 inches in length and 1.90 in breadth. It is of a rounded-oval shape, and is of a uniform dead-white color, with hardly a tinge of green. Another, obtained by Mr. Charles Pease near the head-waters of the Unalakleet River, measures 2.32 by 1.80 inches, and the ground-color is more distinctly greenish-white. A few small spots of a bronze-brown are scattered in isolated marking irregularly over the egg. Lieutenant Bendire writes that he has found the eggs of this Hawk in Montana; that their number in a set is usually two, and an unspotted white.

GENUS ASTURINA, VIEILLOT.

Asturina, VIEILL. 1816. (Type, Falco nitidus, LATHAM.)

GEN. CHAR. Somewhat similar to Astur, but of much heavier and more robust build; tarsi longer and stouter, tail shorter and less rounded, wings longer, etc. Bill more elongated than in Astur, the cere longer, and the festoon on the commissure more developed; nostril oval, horizontal. Wings rather short, but less concave beneath than in Astur; third to fourth quill longest; first shorter than eighth or ninth; four outer quills with their inner webs sinuated. Tail considerably shorter than the wing, slightly emarginated, the lateral pair of feathers longest. Feet large and robust, when outstretched reaching almost to the end of the tail; tarsi very robust compared to the toes, about one and a half times as long as the middle toe, the frontal and posterior rows of transverse scutellæ very distinct and regular; outer toe longer than inner; claws strong, well curved, but not very acute. Sexes alike in color; old and young plumages very different.

=34002=, ♀. ½ =34002=, ♀. ¼ =34002=, ♀. ½

Asturina plagiata.]

This genus is peculiar to tropical America, and contains but a single species, the A. nitida, with its two climatic races, nitida of South America and plagiata of Middle America. The species of Rupornis, Kaup (R. magnirostris and R. leucorrhoa), have been associated with the species of the present genus, but they are very distinct. The genera (or, more properly, subgenera) most nearly related to Asturina are Leucoptrinis, Kaup, of tropical America, and Kaupifalco, Bonap., of Western Africa. The former differs mainly in more or less rounded, instead of emarginated, tail, and in having the old and young plumages similar; the latter in having the posterior face of the tarsus without a well-defined row of transverse scutellæ.

Species and Races.

=A. nitida.= Wing, 9.80–11.50; tail, 6.70–8.00; culmen, .80–1.00; tarsus, 2.50–2.90; middle toe, 1.40–1.75. Adult. Above clear ash, paler on the head and darker on the rump; the general surface with more or less appreciable transverse bars, or indications of bars, of a paler shade, and with darker shafts. Upper tail-coverts immaculate white. Tail deep black, fading into pale grayish-brown at the end, narrowly tipped with white, and crossed by two to three white bands. Lower parts, including the tibiæ, axillars, and throat, regularly barred with deep ash and white, the two colors about equal in extent; chin and crissum immaculate white. Young. Above blackish-brown, variegated with pinkish-ochraceous. Tail umber, tipped with pinkish-brown or dull whitish, and crossed by six to seven narrow bands of black. Beneath white, sometimes tinged with ochraceous; the breast, abdomen, and sides with longitudinal tear-shaped spots of black.

Adult. Upper surface distinctly barred, the lighter bars predominating; the top of the head as distinctly barred as the lower parts. Young. Tibiæ immaculate white or pale ochraceous. Culmen, .80–.90. Hab. South America, from S. E. Brazil and W. Ecuador, to Panama …

var. nitida.

Adult. Upper surface only obsoletely barred, or almost uniform; the top of the head without any bars. Young. Tibiæ transversely barred with dusky. Culmen, .75–.80. Hab. Middle America, north to the southern border of the United States; straying northward in the Mississippi Valley, to Southern Illinois …

var. plagiata.

Asturina nitida, var. plagiata (SCHLEG.).

MEXICAN HAWK.

Asturina nitida, CASS. Birds N. Am. 1858, 35.—SCL. & SALV. Ibis, 1859, 217.—SALV. Ibis, 1861, 68.—SCL. P. Z. S. 1857, pp. 201, 227; 1859, pp. 368, 389; 1864, 178.—LAWR. Ann. N. Y. Lyc. IX, 133.—OWEN, Ibis, III, 1868 (egg white). Asturina cinerea, CASS. P. A. N. S. 1855, 283 (not of VIEILL.!). Asturina plagiata, SCHLEG. Mus. Pays-Bas. Asturinæ, p. 1.—SCL. & SALV. P. Z. S. 1868, 173; 1869, 130.—GRAY, Hand List, I, 30, 1869.—RIDGW. Am. Nat. VI, July, 1872, 430; VII, April, 1873, 203; (Southern Illinois, August).

SP. CHAR. Adult male (51,343, Mazatlan, Mexico; Ferd. Bischoff. “Length, 16.00; extent, 38.00”). Above deep, rather dark cinereous, becoming paler and finer on the head above, where the feathers have the shafts (finely) black; wings with obsolete lighter bars; rump almost black. Upper tail-coverts immaculate pure white. Tail pure black, tipped with pale grayish-brown (this passing terminally into white); about 1½ inches from the tip is a continuous band of white, half an inch in width; and a little over an inch anterior to this is another narrower and less perfect one. Primaries approaching black at ends; the tips broadly edged with dull white, as also the ends of secondaries. Head uniform fine delicate ashy, becoming white on chin and throat, and approaching the same on the forehead; shafts of feathers on head above, and neck, black; neck with obsolete paler transverse bars, these most distinct on jugulum; the breast, abdomen, sides, flanks, axillars, and tibiæ are regularly barred transversely with cinereous and pure white, the bars of each about equal, the white, however, gradually increasing, and the ashy bars narrowing posteriorly, the tibiæ being finely barred; lower tail-coverts immaculate pure white. Lining of the wing white, with very sparse, faint, transverse zigzag bars next the axillars and on larger coverts; under surface of primaries white anterior to their emargination, beyond which they are more silvery, leaving about an inch of the terminal portion black, the end of each, however, ashy; outer two quills crossed by narrow bars of ashy, the rest with indications of the same, near the shaft. Fourth quill longest; third scarcely shorter; second shorter than fifth; first intermediate between eighth and ninth. Wing, 10.50; tail, 7.00; tarsus, 2.60; middle toe, 1.50.

Adult female (34,002, Mazatlan, June; Colonel Grayson). Cinereous above darker, the fasciæ of the wings hardly observable; front and throat scarcely whitish; rump almost pure black; second tail-band much broken and restricted. Ashy prevailing on the jugulum; ashy bars beneath rather broader. Wings, 11.00; tail, 7.50; tarsus, 2.80; middle toe, 1.70.

Young male (35,060, Rio de Coahuyana, W. Mexico, October; J. Xantus). Above, from bill to upper tail-coverts, dark bistre-brown, almost black; feathers of the head and neck edged laterally with pinkish-ochraceous, or sulphuret of manganese color; scapulars with nearly whole outer webs of this color, they being blackish only along edges and at ends; middle wing-coverts spotted with the same. Secondaries and primaries faintly tipped with whitish; secondaries with indications of darker bands, and outer webs of primaries with still more obscure ones; upper tail-coverts white, with sagittate specks of black, one or two on each. Tail umber-brown (considerably lighter than the wings), tipped with pinkish-ash (this passing terminally into dull white), and crossed with six or seven bands of black (these becoming gradually, but very considerably, narrower toward the base). Beneath white, with vinaceous tinge (this deepest laterally); breast, abdomen, and sides with large tear-shaped or cuneate spots of black; tibiæ with numerous transverse bars of the same.

Young female. Similar to last, but the brown lighter, and more approaching umber.