THE GOS HAWK (Astur palumbarius).
THE TRUE HAWK, OR GOS HAWK.
The TRUE HAWK, or GOS HAWK (Aster palumbarius) resembles the Sparrow Hawk in many of its features, but differs from that bird in the compactness of its body, and in the strength of its beak; the tail is rounded, the feet powerful, and the plumage peculiarly marked. This Hawk is about one foot and three-quarters in length, and three feet and a half across; the wing measures twelve inches, and the tail eight and a half; the female is five inches longer and six inches broader than her mate. The plumage upon the upper part of the body is blackish brown, more or less shaded with greyish blue; the lower portions are white, the shafts of the feathers being brownish black, as are the undulating lines with which they are ornamented; the beak is greyish brown, the cere, eyes, and feet pale yellow. In young birds the upper portion of the body is brown, each feather being bordered and spotted with reddish yellow; the lower parts are of a reddish shade, and at a later period of a reddish white, marked with longitudinal brown streaks; the beak, eyes, cere, and feet are paler than in the adult.
The habitat of the Gos Hawk is as extensive as that of the Sparrow Hawk; it is found in great numbers in northern countries, and in some districts may be regarded as stationary; in Southern Europe it is extremely rare, and, according to our own observation, is seldom met with in Northern Africa or India. Wooded country, interspersed with fields and valleys, afford it the localities it prefers, and it is much more numerous in extensive forests than in comparatively small woods. In its habits this species is eminently unsocial, living almost invariably alone, except during the breeding season; its disposition is cunning, wild, and violent, and its movements active and powerful. When upon the wing, it may be seen hovering from time to time, and then rushing down upon its prey with noisy impetuosity; in making a swoop it cleaves the air with great force, the tail at these times being partly outspread. In the air the Gos-Hawk is completely master of its movements, and steers its course with imposing majesty; whilst upon the ground, on the contrary, its gait is awkward and ungainly, its step being a sort of lame hop. Its voice consists of a variety of sounds, but is rarely heard; it is loud, resonant, and extremely unpleasing. So rapacious is this formidable bird, that its destructive attacks are repeated almost without intermission during the entire day on birds of all sizes, and even rabbits, squirrels, and water-fowl may be numbered among its victims, the prey being seized with equal facility either when running, flying, or swimming; some of the smaller quadrupeds are so completely paralysed with fear at the approach of their destroyer that they crouch down incapable of moving a limb, while the Hawk swoops down upon them with wings almost closed and talons outspread, producing as it descends a rushing sound, that may be heard above a hundred paces from the spot. Remarkable anecdotes are cited by reliable writers of the extreme cunning and intelligence of these birds when strength proves unavailing. Count Wodzicki tells of a sagacious Hawk that, when all other means had failed by which it hoped to seize upon some tempting but wary pigeons, at length decided upon perching motionless upon a branch, with neck drawn in, so as to simulate an owl; the ruse completely succeeded, for the birds, fearing nothing from the huge but helpless looking creature, ventured out and were seized with a rapidity from which escape was hopeless. The same author mentions an instance of a trick played upon another flock of pigeons, in which very different means were adopted; the Hawk in this case, finding that its hoped-for prey utterly refused to come out and allow themselves to be caught, at last alighted upon the dove-cot, and beat and stamped upon it with such violence that the terrified inhabitants were fairly driven from their retreat. Audubon mentions having seen a Hawk kill five Blackbirds in succession as a flock was passing the Ohio, the victims being successively thrown down upon the water until the destroyer had time to collect them at his leisure; this latter feat was accomplished by a series of very dexterous movements, and the booty safely deposited upon dry land. The extraordinary rapacity of the Hawk fully accounts for its unsocial habits; it would, in fact, be impossible for these birds to live together; no relation of life appears to excite any natural feeling, even parents, devour their offspring with the most revolting cruelty—indeed, so great is their ferocity, that although provided with abundance of other food, they cannot restrain their murderous propensities, if brought in contact with birds even of their own species. Such of the feathered denizens of the forest as are sufficiently swift of wing to be able to elude the Gos Hawk, pursue it fearlessly, and chase it with rude cries whenever it appears; Crows and Swallows are particularly addicted to this most harassing mode of avenging the wrongs of their more helpless companions.
The eyrie of this species is large and shallow, built of green fir or pine branches, which are added to or renewed from time to time; the bed for the young is lined with down stripped from the parent birds. Old and high trees are usually preferred for building purposes, the nest being placed on a large branch near the main stem; year after year a pair of Hawks will return to the same spot, at each visit making such repairs as the eyrie requires, and renewing the green branches. The eggs, two to four in number, are large, long, and very wide towards the middle; the shell is thick, rough, of a greenish-white colour, and either entirely unmarked, or spotted with yellow; the female alone sits, but both parents guard the nest with jealous care, often attacking men, or even horses should they approach too near. The young grow very quickly, and are so voracious that the eyrie often looks like a slaughter-house, the parents having as much to do as they can manage in catering for their clamorous family, whose greed is so excessive that they will often fall upon and destroy each other when too impatient to await a fresh supply of food. Many and various are the means employed to clear the country of these destructive birds, but all attempts prove inadequate to cope with the extreme cunning and sagacity which they display on the approach of danger. In some parts of Asia their worst qualities are the points on which the favour of the native falconers is grounded, and by them these birds are prized as unrivalled for the purposes of the chase; they even employ them in the pursuit of such large game as hares. When about to hunt large animals, the legs of the Hawk are carefully covered with a kind of leather gaiters, to defend them when dragged through bushes and brambles, as their intended victim endeavours to escape from its clutch; seldom, however, does it succeed, for the bird holds firmly on with one foot, keeping the other raised to clear aside the branches, or get a firm grasp upon a bush, and thus arrest the progress of its quarry when the proper moment arrives.
The SINGING HAWKS (Melierax) are an African group, differing somewhat in shape from their European relatives. Their body is more slender, the beak less powerful, and the wings longer than in the races hitherto described; the tail is rounded at its extremity; the tarsi are strong and high, and the feet provided with comparatively short claws.
THE TRUE SINGING HAWK.
The TRUE SINGING HAWK (Melierax musicus), as the largest member of this group is called, inhabits Southern Africa, and is replaced in the central portions of that continent by another species (Melierax polygonus), closely resembling it in appearance, though somewhat smaller. In the latter the plumage on the upper part of the body, throat, and upper breast, is slate-coloured; the belly, wings, hose, and large wing-covers are white, striped with delicate grey zig-zag markings. The quills are brownish black, the tail-feathers of a paler shade, the latter are tipped with white, and striped three times with a crooked white line; the iris is of a beautiful brown, the beak dark blue, the cere and feet bright orange. The length of this bird is about one foot seven inches, its breadth three feet two inches; the wing measures eleven inches and two-thirds, the tail eight inches and one-third. The female is about one inch and a half longer and two inches broader than her mate. The plumage of the young is brown above, and upon the belly and breast white striped across with light brown; the sides of the head and a line over the breast are of the latter colour. The first-mentioned species is similar in its colour and markings. Le Vaillant, who first described these remarkable Hawks, tells us that they are numerous in Caffraria, where they usually frequent the widely scattered trees, and subsist principally upon hares, partridges, quails, rats, mice, or similar fare. The nest is large, and contains four pure white eggs. Le Vaillant has given the name of Singing Hawk to the species, from an extraordinary fact of which he assures us he had personal experience, namely, that they are capable of pouring out a flow of song, and sometimes continue their vocal exercise for hours together. For our own part we have never heard one of these birds sing, and therefore must abstain from either depreciating or maintaining this statement; but similar species, carefully observed by ourselves, in the more northern parts of Africa, were capable of nothing but a prolonged whistle or piping scream. In appearance alone do these Hawks bear any resemblance to their European congeners; in their habits they are dull, extremely indolent, and entirely incapable of the daring exploits that render other members of their race so formidable; it is by no means uncommon for them to sit for hours together dozing upon a tree, or lazily scanning the surrounding country almost too idly even to note the prey they might easily secure. When in the air their movements resemble in some respects those of our Hawk, but are entirely without the precision and rapidity which render that bird so terrible an opponent. Whilst perched among the branches their appearance is ungainly, as they squat motionless with head drawn in, staring fixedly at one particular spot. According to our own experience, they devour toads, grasshoppers, and various kinds of insects in great numbers; Hartmann tells us that they will also eat lizards. The prey is usually pounced upon as it goes down to the water to drink, yet even then, so slow and apathetic is this bird in its behaviour, that an attempt to seize the victim often proves abortive. We are entirely destitute of particulars as to the incubation of this species.