Cassell's book of birds; vol. 2

by Alfred Edmund Brehm

THE HAWKS (Accipitres) are a group of birds that rival the Falcons in rapacity, but are entirely without those qualities popularly supposed to lend a certain nobility to the murderous propensities of their more favoured relatives.

The HAWKS are recognisable by their compact body, long neck, and small head, their short rounded wings, very long tail, and high tarsi; the toes vary considerably in size. The beak is less vaulted and more compressed at its sides than in the Falcons; the tooth-like appendages are placed further back, and are less distinctly developed, and the bare circle around the eye is entirely wanting. The plumage is thick and soft, usually dark blueish grey above, and of a lighter shade upon the lower parts of the body, the latter being often darkly striped. Old birds of both sexes are alike in plumage, but the young differ considerably from their parents. The members of this family are found throughout the whole world, some species being confined to a comparatively limited extent of country, whilst others are to be met with everywhere. All frequent woods and forests, from whence they sally forth to find their food in the fields and valleys of the surrounding country. Hawks seldom fly to any great altitude; they move with great rapidity, altering their course at once with the utmost facility, and passing in and out among the branches and bushes with the dexterity of a Martin; they run swiftly upon the ground, assisting their progress with their wings. Their eyrie is usually built upon high trees, and is by some species prettily decked with green twigs, which are renewed from time to time. The eggs are numerous, and during the period of incubation the parent birds will fiercely attack even men should they attempt to molest the brood. Some few species have been trained for hunting purposes, but these attempts have almost always proved unsuccessful.

THE LAUGHING HAWK.

The LAUGHING HAWK (Herpetotheres cachinnans) is a South American bird, to which we have assigned the first place, inasmuch as in some respects it resembles the Falcons; the name it bears has been given to it on account of the very peculiar sound of its loud and resonant voice. Its distinguishing characteristics are its comparatively large head, which is profusely covered with feathers, and the robust development of the hinder parts of its body. The wings when closed reach to the middle of the tail, their primaries are narrow and pointed, the third and fourth quills being longer than the rest; the tail is long, the exterior feathers somewhat shortened; the tarsi are of moderate height and strength, the toes small, and the claws remarkably short and thick; the beak is short, much compressed at its sides, and terminates in a short hook; the lower mandible is shallow, and bifurcated at its tip; the region of the eye is bare, and the body covered with long-pointed and strong-shafted feathers. In size the Laughing Hawk resembles its European congeners; the plumage is pale yellow from the top of the head to the nape, each feather having a black shaft; the bridles, nape, and cheeks are black, the mantle brown, the feathers being bordered with a lighter shade; the entire lower portion of the body and a stripe upon the neck are white, which changes into red upon the breast and legs; the upper part of the tail is black, its under portion whitish yellow, tipped with white and ornamented with six or seven grey stripes; the inner web of the brown quills which form the wings is shaded from reddish yellow to white, and edged with a delicate irregular brown line; the eye is reddish yellow, the beak black, the cere and legs are yellow.

THE DOUBLE-TOOTHED HAWK.

The DOUBLE-TOOTHED HAWK (Harpagus bidentatus) resembles the Falcons in its general form, but is recognisable by its comparatively small head, long broad tail, and short wings. The beak is very peculiar in its construction, the upper portion being excised immediately behind the hook at its tip, and the lower mandible, which terminates abruptly, has near its extremity two sharp teeth at each side; the third quill of the wings is longer than the rest, the tarsi are short, and of the same length as the toes. This bird, of which there are two species, is only found in South America.

The Guaviao, as the Double-toothed Hawk is called by the Brazilians, is thirteen and a half inches long and twenty-six inches broad; the wing measures eight inches, and the tail six inches. The plumage upon the upper part of the body is blackish grey, embellished with a metallic lustre; the under portions are reddish brown, with narrow white stripes upon the throat; the rump is also white, the quills of the wings are brown, ornamented with an irregular border, which is pure white upon the inner web; the tail is black above, brown beneath, and marked with three broad and crooked lines; the eye is light carmine, the cere greenish yellow, the beak blackish grey, and the feet of a beautiful reddish yellow. The plumage of the young is brown above and white beneath, delicately marked with undulating brown lines of various shades.

THE SPARROW HAWK.

The SPARROW HAWK (Nisus communis) is the European representative of a very numerous group distributed throughout the world. These birds (see Coloured Plate IX.) are distinguished by their elongated body, small head, and delicate beak, furnished with a very sharp hook at the extremity of the upper mandible; the wings are short, tail long, and short at its tip; the tarsi are high and weak, the toes long and slender, and armed with extremely sharp claws. The plumage varies but little in its colour. This species is about one foot long, and two broad; the wing measures seven inches and two-thirds, and the tail six inches; the female is about three inches longer and five inches broader than her mate. In the full-grown bird the entire upper portion of the body is blackish grey, the under parts are white, marked with undulating reddish brown lines; the shafts of the feathers are also of the latter hue, and brighter in colour in the male than in the female; the tail is tipped with white, and has five or six black stripes. In the young birds the upper portion of the body is a greyish brown, beneath the throat white, striped with brown; the belly and legs are ornamented with irregular spots, the beak is blue, the cere yellow, the iris golden yellow, and the feet pale yellow.

The Sparrow Hawk inhabits the whole of Europe and Central Asia; it is stationary in some parts of the latter continent, but migrates from Europe as winter approaches, and seeks a warmer climate in Northern Africa or India, appearing, according to Jerdon, in the latter country about the beginning of October, and leaving about February or March. This species makes its home principally in woodland districts, preferring such regions as are mountainous or hilly, and is more numerous in the central portions of Europe than in the extreme south. Despite the shortness of its wings, the Sparrow Hawk flies with ease and rapidity, but when upon the ground it hops in the most ungainly manner. Towards such of its feathered brethren as are larger than itself it exhibits no trace of fear, and pounces upon its prey with a dexterity and courage that will bear comparison with the demeanour of the noblest of its congeners. In these encounters, the female bird has decidedly the advantage over her mate, and can bear the brunt of a battle to which his strength would be quite inadequate. Instances have been recorded in which this Hawk has been so eager in the pursuit of its prey as to follow the victim even into a house or wagon, and we lately heard of one darting into a railway carriage when in rapid motion in order to secure its prize. Birds of all sizes, including domestic fowls, are boldly attacked; Naumann mentions having even seen a Sparrow Hawk swoop down and fasten itself upon the back of a Heron. Small quadrupeds are devoured by these birds in great numbers, and they will sometimes stoop upon hares, but whether this is done with any hope of overcoming them, or merely for pleasure, we have not been able to ascertain. In so much dread is this formidable enemy held by the objects of its attack, that on its approach some birds will throw themselves as though dead upon the ground; others will make for their hiding-place with such devious turnings from the direct path as baffle even the skilful steering of their pursuer, and then dart into the inmost recesses of some protecting bush, and thus place themselves for the time in safety. Such of the swift-flying smaller birds as do not hold the Sparrow Hawk in dread, avenge themselves by following it boldly with loud cries whenever it appears; and so annoying does this reception prove to the tyrant of the woodland, that on the approach of some species of Swallows, whose flight is too rapid to admit of revenge, it will soar at once high into the air and beat a hasty retreat to its forest glades. The prey of the Sparrow Hawk is usually conveyed to some quiet spot to be devoured at leisure; the large quills are then pulled out and the carcase devoured piecemeal, the indigestible portions, such as bones, feathers, and hair, being subsequently ejected from the mouth, collected into large balls called castings; it also frequently destroys the eggs and young of such birds as make their nests upon the ground. The voice of this species is but seldom heard except during the breeding season. The nest, which is placed in some thicket at no great elevation, is built of small branches of fir, birch, or pine trees, and the slight hollow that forms the bed for the young is lined with down from the body of the female parent. The eggs, from three to five in number, are large, and very various both in shape, colour, and size; the shell is thick, smooth, white, or greyish or greenish white, and more or less distinctly marked with spots of reddish brown or greyish blue, sometimes lying thickly together and sometimes very sparsely scattered over the surface. The female alone sits upon the eggs, and testifies the utmost solicitude and affection for her young brood, retaining her seat upon the nest in spite of repeated alarms, and doing battle with all intruders. Both parents seek the food necessary for the young family, though the female only is capable of preparing morsels delicate enough for the tender beaks of the nestlings, who, we are told, occasionally perish from hunger should they lose their mother and be left to the more clumsy ministrations of the male bird. The young are fed and instructed long after they have left the nest. Most numerous are the dangers to which the European Sparrow Hawk is exposed, for not only men, but all such birds as are more powerful than itself pursue it with unextinguishable hatred and animosity; in some parts of Asia, on the contrary, it is regarded with favour, owing to the facility with which it can be trained to hunt the smaller kinds of game, particularly Quails; in the southern districts of the Ural, according to Eversmann, large numbers caught in the summer are trained for this purpose, and after having been employed during the autumn are again let loose in order to avoid the difficulty of keeping them through the winter months. The female alone is reared for the chase, the male, when captured, being allowed to fly again, as useless. In India this bird and another species are regarded with equal favour, and are employed by the native falconers in the pursuit of Partridges, Quails, Snipes, Pigeons, and Minas.