Читать книгу The Peregrine: The Hill of Summer & Diaries: The Complete Works of J. A. Baker - Mark Cocker - Страница 9

The hardest thing of all to see is what is really there. Books about birds show pictures of the peregrine, and the text is full of information. Large and isolated in the gleaming whiteness of the page, the hawk stares back at you, bold, statuesque, brightly coloured. But when you have shut the book, you will never see that bird again. Compared with the close and static image, the reality will seem dull and disappointing. The living bird will never be so large, so shiny-bright. It will be deep in landscape, and always sinking farther back, always at the point of being lost. Pictures are waxworks beside the passionate mobility of the living bird.

Female peregrines, known as falcons, are between seventeen and twenty inches long; roughly the length of a man’s arm from elbow to fingertip. Males, or tiercels, are three to four inches shorter, fourteen to sixteen inches long. Weights also vary: falcons from 1¾ to 2½ pounds, tiercels from 1¼ to 1¾ pounds. Everything about peregrines varies: colour, size, weight, personality, style: everything.

Adults are blue, blue-black, or grey, above; whitish below, barred crosswise with grey. During their first year of life, and often for much of their second year also, the younger birds are brown above, and buff below – streaked vertically with brown. This brown colour ranges from foxy red to sepia, the buff from pale cream to pale yellow. Peregrines are born between April and June. They do not begin to moult their juvenile feathers till the following March; many do not begin till they are more than a year old. Some may remain in brown plumage throughout their second winter, though they usually begin to show some adult feathers from January onwards. The moult may take as long as six months to complete. Warmth speeds it, cold retards it. Peregrines do not breed till they are two years old, but one-year birds may select an eyrie and defend territory.

The peregrine is adapted to the pursuit and killing of birds in flight. Its shape is streamlined. The rounded head and wide chest taper smoothly back to the narrow wedge-shaped tail. The wings are long and pointed; the primaries long and slender for speed, the secondaries long and broad to give strength for the lifting and carrying of heavy prey. The hooked bill can pull flesh from bones. It has a tooth on the upper mandible, which fits into a notch in the lower one. This tooth can be inserted between the neck vertebrae of a bird so that, by pressing and twisting, the peregrine is able to snap the spinal cord. The legs are thick and muscular, the toes long and powerful. The toes have bumpy pads on their undersides that help in the gripping of prey. The bird-killing hind toe is the longest of the four, and it can be used separately for striking prey to the ground. The huge pectoral muscles give power and endurance in flight. The dark feathering around the eyes absorbs light and reduces glare. The contrasting facial pattern of brown and white may also have the effect of startling prey into sudden flight. To some extent it also camouflages the large, light-reflecting eyes.

The speed of the peregrine’s wing-beat has been recorded as 4.4 beats per second. Comparative figures are: jackdaw 4.3, crow 4.2, lapwing 4.8, woodpigeon 5.2. In level flapping flight the peregrine looks rather pigeon-like, but its wings are longer and more flexible than a pigeon’s and they curl higher above the back. The typical flight has been described as a succession of quick wing-beats, broken at regular intervals by long glides with wings extended. In fact, gliding is far from regular, and at least half the peregrine flights I have seen have contained few, if any, glides. When the hawk is not hunting, the flight may seem slow and undulating, but it is always faster than it looks. I have timed it at between thirty and forty miles an hour, and it is seldom less than that. Level pursuit of prey has reached speeds of fifty to sixty miles an hour over distances of a mile or more; speeds in excess of sixty m.p.h. were only attained for a much shorter time. The speed of the vertical stoop is undoubtedly well over a hundred miles an hour, but it is impossible to be more precise. The excitement of seeing a peregrine stoop cannot be defined by the use of statistics.

Peregrines arrive on the east coast from mid-August to November; the majority reach here in late September and the first half of October. They may come in from the sea in any weather conditions, but are most likely to do so on a clear sunny day with a fresh north-west wind blowing. Passage birds may stay in one area for two to three weeks before going south. Return passage lasts from late February to May. Winter residents usually depart in late March or early April. Juvenile falcons are the first peregrines to arrive in the autumn, followed by juvenile tiercels, and later by a few adult birds. Most adults do not come so far south, but remain as close as they can to their breeding territory. This order of migration, which prevails along the European coastline from the North Cape to Brittany, is similar to that observed on the eastern coast of North America. Ringing recoveries suggest that immigrants to the east coast of England have come from Scandinavia. No British-ringed peregrines have been recovering in south-east England. Generally speaking, all the juveniles that wintered in the river valley, and along the estuaries, were paler in colour than juveniles from British nests; they had a distinctive wing pattern of light reddish-brown wing coverts and secondaries contrasting with black primaries, similar to that of a kestrel. The territory in which my observations were made measures roughly twenty miles from east to west and ten miles from north to south. It was hunted over by at least two peregrines each winter, sometimes by three or four. The river valley and the estuary to the east of it are both ten miles in length. Together they formed a long narrow centre to the territory, where at least one peregrine could always be found. Why these particular places were chosen it is difficult to be sure. Most parts of England, including towns and cities, could provide a winter’s keep for a resident peregrine, yet certain areas have always been regularly visited, while others have been ignored. Peregrines that have a definite liking for duck of shore birds will obviously be found on the coast, at reservoirs and sewage farms, or in fenland. But the birds that wintered in the valley took a wide range of prey, in which woodpigeons and black-headed gulls predominated. I think they came here for two reasons: because this was a wintering place that had been used for many years, and because the gravelly streams of the valley provided ideal conditions for bathing. The peregrine is devoted to tradition. The same nesting cliffs are occupied for hundreds of years. It is probable that the same wintering territories are similarly occupied by each generation of juvenile birds. They may in fact be returning to places where their ancestors nested. Peregrines that now nest in the tundra conditions of Lapland and the Norwegian mountains may be the descendants of those birds that once nested in the tundra regions of the lower Thames. Peregrines have always lived as near the permafrost limit as possible.

Peregrines bathe every day. They prefer running water, six to nine inches deep; nothing less than two inches or more than twelve inches is acceptable to them. The bed of the stream must be stony or firm, with a shallow incline sloping gradually down from the bank. They favour those places where the colour of the stream-bed resembles the colour of their own plumage. They like to be concealed by steep banks or overhanging bushes. Shallow streams, brooks, or deep ditches, are preferred to rivers. Salt water is seldom used. Dykes lined with concrete are sometimes chosen, but only if the concrete has been discoloured. Shallow fords, where brown-mottled country lanes are crossed by a fast-running brook, are favourite places. For warning of human approach they rely on their remarkably keen hearing and on the alarm calls of other birds. The search for a suitable bathing place is one of the peregrine’s main daily activities, and their hunting and roosting places are located in relation to this search. They bathe frequently to rid themselves of their own feather lice and of the lice that may transfer to them from the prey they have killed. These new lice are unlikely to live long once they have left their natural host species, but they are an additional irritation to which the hawk is most sensitive. Unless the number of lice infesting the hawk’s feathers is controlled by regular bathing, there can be a rapid deterioration in health, which is dangerous for a juvenile bird still learning to hunt and kill its prey. Though there can be many variations, a peregrine’s day usually begins with a slow, leisurely flight from the roosting place to the nearest suitable bathing stream. This may be as much as ten to fifteen miles away. After bathing, another hour or two is spent in drying the feathers, preening, and sleeping. The hawk rouses only gradually from his post-bathing lethargy. His first flights are short and unhurried. He moves from perch to perch, watching other birds and occasionally catching an insect or a mouse on the ground. He re-enacts the whole process of learning to kill that he went through when he first left the eyrie: the first, short, tentative flights; the longer, more confident ones; the playful, mock attacks at inanimate objects, such as falling leaves or drifting feathers; the games with other birds, changing to a pretence or attack, and then to the first serious attempt to kill. True hunting may be a comparatively brief process at the end of this long re-enactment of the hawk’s adolescence.

Hunting is always preceded by some form of play. The hawk may feint at partridges, harass jackdaws or lapwings, skirmish with crows. Sometimes, without warning, he will suddenly kill. Afterwards he seems baffled by what he has done, and he may leave the kill where it fell and return to it later when he is genuinely hunting. Even when he is hungry, and has killed in anger, he may sit beside his prey for ten to fifteen minutes before starting to feed. In these cases the dead bird is usually unmarked, and the hawk seems to be puzzled by it. He nudges it idly with his bill. When blood flows, he feeds at once.

Regular hunting over the same area will produce an increasingly effective defensive reaction from possible prey. It is always noticeable that the reaction of birds to a peregrine flying above them is comparatively slight in September and October, but that it steadily increases throughout the winter, till in March it is violent and spectacular. The peregrine has to avoid frightening the same birds too often, or they may leave the area altogether. For this reason he may be seen hunting in the same place for several days in succession, and then not be seen there again for a week or more. He may move only a short distance, or he may go twenty miles away. Individuals vary greatly in their hunting habits. Some hunt across their territory in straight lines five to fifteen miles long. They may suddenly turn about and fly back on the same course to attack birds already made uneasy. These hunting lines may run from estuary to reservoir to valley, and from valley to estuary; or they may follow the lines of flight from roosting places to bathing places. The territory is also effectively quartered by long up-wind flights, followed by diagonal down and cross wind gliding that finishes a mile or two away from the original starting point. Hunting on sunny days is done chiefly by soaring and circling down wind, and is based on a similar diagonal quartering of the ground. When an attack is made, it is usually a single vicious stoop. If it misses, the hawk may fly on at once to look for other prey.

In early autumn, and in spring, when days are longer and the air warmer, the peregrine soars higher and hunts over a wider area. In March, when conditions are often ideal for soaring, his range increases, and by long stoops from a great height he is able to kill larger and heavier prey. Cloudy weather means shorter flights at lower levels. Rain curtails the hunting range still further. Fog reduces it to a single field. The shorter the day the more active the hawk, for there is less time available for hunting. All its activities contract or expand with the shortening or lengthening of days on either side of the winter solstice.

Juvenile peregrines hover whenever the wind is too strong to allow them to circle sufficiently slowly above the area they are surveying. Such hovering usually lasts for ten to twenty seconds, but some birds are more addicted to the habit than others and will hover persistently for long periods. The hunting hawk uses every advantage he can. Height is the obvious one. He may stoop (stoop is another word for swoop) at prey from any height between three feet and three thousand. Ideally, prey is taken by surprise: by a hawk hidden by height and diving unseen to his victim, or by a hawk that rushes suddenly out from concealment in a tree or a dyke. Like a sparrowhawk, the peregrine will wait in ambush. The more spectacular methods of killing are used less often by juveniles than they are by adults. Some soaring peregrines deliberately stoop with the sun behind them. They do it too frequently for it to be merely a matter of chance.

Like all hunters, the peregrine is inhibited by a code of behaviour. It seldom chases prey on the ground or pursues it into cover, in the manner of other hawks, though it is quite capable of doing so. Many adults take only birds in flight, but juveniles are less particular. Peregrines perfect their killing power by endless practice, like knights or sportsmen. Those most adaptable, within the limits of the code, survive. If the code is persistently broken, the hawk is probably sick or insane.

Killing is simple once the peregrine has the advantage of his prey. Small, light birds are seized in his outstretched foot; larger, heavier birds are stooped at from above, at any angle between ten and ninety degrees, and are often struck to the ground. The stoop is a means of increasing the speed at which the hawk makes contact with his prey. The momentum of the stoop adds weight to the hawk and enables him to kill birds twice as heavy as himself. Young peregrines have to be taught to stoop by their parents; captive birds have to be trained by falconers in a similar way. The action of stooping does not seem to be innate, though it is quickly learnt. The ability to stoop at birds in flight was probably a comparatively recent evolutionary development, superseding capture by follow-chase and the taking of ground-game. Most birds still fly up from the ground when a peregrine passes above them, though this may increase their vulnerability.

The peregrine swoops down towards his prey. As he descends, his legs are extended forward till the feet are underneath his breast. The toes are clenched, with the long hind toe projecting below the three front ones, which are bent up out of the way. He passes close to the bird, almost touching it with his body, and still moving very fast. His extended hind toe (or toes – sometimes one, sometimes both) gashes into the back or breast of the bird, like a knife. At the moment of impact the hawk raises his wings above his back. If the prey is cleanly hit – and it is usually hit hard or missed altogether – it dies at once, either from shock or from the perforation of some vital organ. A peregrine weighs between 1½ and 2½ lbs.; such a weight, falling from a hundred feet, will kill all but the largest birds. Shelduck, pheasants, or great black-backed gulls usually succumb to a stoop of five hundred feet or more. Sometimes the prey is seized and then released, so that it tumbles to the ground, stunned but still alive; or it may be clutched and carried off to a suitable feeding place. The hawk breaks its neck with his bill, either while he is carrying it or immediately he alights. No flesh-eating creature is more efficient, or more merciful, than the peregrine. It is not deliberately merciful; it simply does what it was designed to do. The crow-catchers of Königsberg kill their prey in the same way. Having decoyed the crows into their nets, they kill them by biting them in the neck, severing the spinal cord with their teeth.

The peregrine plucks feathers from his prey before he begins to eat. The amount of plucking varies, not only with the hunger of the hawk, but also according to individual preference. Some hawks always pluck their prey thoroughly, others pull out only a few beakfuls of feathers. Peregrines hold the prey steady by standing on it, gripping it with the inner talon of one or both feet. Plucking takes two to three minutes. Eating takes ten minutes to half an hour, depending on the size of the prey; ten minutes for a fieldfare or redshank, half an hour for a pheasant or mallard.

Prey may be eaten where it falls, if it is too heavy to carry off, or if it has landed in a suitable place. Many peregrines seem to be quite indifferent, feeding wherever they happen to make a kill. Others prefer a completely open place, or a completely secluded one. Seventy per cent of the kills I have found were lying on short grass, although most of the land here is arable. Peregrines like a firm surface to feed on. Small kills are often eaten in trees, especially in autumn. Birds reared in tree nests may eat their kills in trees whenever possible. On the coast, some peregrines prefer the top of the sea-wall for feeding, others eat at the foot of the wall, near the water line. The latter may have come from cliff eyries and be used to a steep slope above them as they eat.

A peregrine kill can be easily recognised. The framework of a bird is left on its back, with the wings untouched and still attached to the body by the shoulder-girdles. The breast-bone and all the main bones of the body may be quite fleshless. If the head has been left, the neck vertebrae will usually be fleshless also. The legs and back are frequently left untouched. If the breast-bone is still intact, small triangular pieces will have been nipped out of it by the peregrine’s bill. (This is not always true of very large birds, which have thicker bones.) When a kill is left with a good deal of meat still on it, the peregrine may return next day, or even several days later, to finish it up. Surplus meat from abandoned kills helps to support foxes, rats, stoats, weasels, crows, kestrels, gulls, tramps, and gypsies. The feathers are used by long-tailed tits in the construction of their nests. I have found an unusual concentration of such nests in areas where many kills have been made.

No other predator conflicts with the peregrine in the pursuit of prey, but it is sometimes prevented from hunting in certain places by the determined and concerted attacks of crows. When man is hunting, the peregrine goes elsewhere. It is remarkably quick to distinguish between an unarmed man and a man with a gun. There is a curious relationship between peregrines and kestrels that is difficult to define. The two species are often seen in the same place, especially in autumn and spring. I rarely saw one of them without finding the other close by. They may share the same bathing places, the peregrine may occasionally rob the kestrel of its prey, the kestrel may feed on kills the peregrine has left, the peregrine may attack birds that the kestrel unwittingly puts up for him. In September and October some peregrines seem to copy the kestrel’s way of hunting, and I have seen the two species hovering together over the same field. In a similar way, I have seen a peregrine hunting near a short-eared owl, and apparently mimicking its style of flight. By March the relationship between kestrel and peregrine has changed; the peregrine has become hostile, and will stoop at, and probably kill, any kestrel hovering near him.

During ten winters I found 619 peregrine kills. Individual species were represented as follows:

Woodpigeon

38%

Black-headed gull

14%

Lapwing

6%

Wigeon

3%

Partridge

3%

Fieldfare

3%

Moorhen

2%

Curlew

2%

Golden plover

2%

Rook

2%

In addition to these ten, there were 35 other species taken, to make up the remaining 25% of the total. Analysed by families, these are the proportions:

Pigeons

39%

Gulls

17%

Waders

16%

Duck

8%

Game

5%

Corvids

5%

Small or medium-sized Passerines

5%

Others

5%

More woodpigeons were killed during the winter I have described in this book, because of their extraordinary abundance in the cold weather, and because of the absence of other inland species at that time. The relative figures for this particular winter are as follows:

Woodpigeon

54%

Black-headed gull

9%

Lapwing

7%

Wigeon

3%

Partridge

3%

Fieldfare

2%

Moorhen

2%

Curlew

2%

Rook

2%

Mallard

2%

The remaining 14% was made up of 22 other species.

These tables suggest that the juvenile peregrine preys mainly on those species that are most numerous in its hunting territory, provided they weigh at least half a pound. Sparrows and starlings are very common here, but few are killed by peregrines. Of the larger birds, the commonest and most widely distributed species are woodpigeons, black-headed gulls, and lapwings, in that order. If the total weight of available prey is considered, the woodpigeon probably represents a proportion of the total biomass approximately equal to the percentage of woodpigeons actually killed by the peregrine. The method of selection employed, if there is one, may in fact be nothing more spectacular than this: that the peregrine kills most frequently the species of bird it sees most frequently, provided it is a reasonably large and conspicuous one. The presence of abnormally large numbers of any species of bird invariably results in a higher proportion of that species being killed by the peregrine. If a dry summer enables more partridges to breed successfully, then more partridges will be taken by the peregrine during the following winter. If wigeon numbers increase when the cold weather comes, more wigeon will be killed. Predators that kill what is commonest have the best chance for survival. Those that develop a preference for one species only are more likely to go hungry and to succumb to disease.

Over the valley and the estuary, many gulls and lapwings are killed by the peregrine in October and November, chiefly from freshly ploughed land. From December to February woodpigeons are the main prey, especially in hard weather, when fewer lapwings are available. Woodpigeons are still taken in March, the killing of lapwings and gulls increases again, and more duck are killed than in any other month. Game-birds, moorhens, fieldfares, and waders, are taken occasionally throughout the winter. In rain or fog, game-birds and moorhens become the principal prey. Ducks are killed far less often than is popularly supposed. This is true of all countries, both in summer and winter; the peregrine is definitely not a ‘duck-hawk’. Domestic and feral pigeons figure highly in most lists of peregrine kills, but I have found none here. No peregrine I have seen has ever attacked them, or shown any interest in them at all.

The peregrine’s choice of prey can be affected by weather conditions. When a wet summer is followed by a wet winter, the land becomes water-logged, ploughing is delayed, and the valley bathing-places are covered by flood-water. Peregrines then hunt over the grasslands to the south of the valley and between the two estuaries. They bathe in ditches or at the edge of flood-water. Some birds prefer to hunt over grassland, irrespective of weather conditions. These green-country peregrines arrive late in the autumn and stay till late April or early May. Possibly they come from the Lapland tundra, where the country, in summer, is like a huge emerald sponge. The wet marsh pastures, and the green fields of the heavy clay, are the colour of home to them. They range over vast distances, they fly high, they are much harder to find and follow than the comparatively sedentary peregrines of the valley. Lapwings, gulls, and fieldfares, feeding on worms in wet pastures, are their favourite prey. Clover-eating woodpigeons are taken from January to March. Nest-building rooks are often attacked.

It seems unlikely that the peregrine can have a discriminating sense of taste. If it has a preference for a certain species, it is probably because of the texture of the flesh and the amount of tender meat on the bones. Rooks, jackdaws, gulls, sawbill ducks and grebes, are all more or less distasteful to the human palate, but are eaten by the peregrine with apparent relish.

Conspicuousness of colour or pattern increases vulnerability and influences the peregrine’s choice of prey. Birds moving from place to place are always vulnerable, whether they are flying to and from their roosts along known ways, or merely passing over the territory on migration. Recent arrivals are attacked at once, before they can learn refuges. The odd are always singled out. The albinos, the sick, the deformed, the solitary, the imbecile, the senile, the very young; these are the most vulnerable.

Predators overcome their prey by the exploitation of weakness rather than by superior power. As in the following instances:

Woodpigeon

The white wing and neck feathers are visible at a great distance. White shows up against all ground-colours. The peregrine sees and reacts to white more rapidly than to any colour. Eight per cent of the birds killed in the territory were either mainly white or showed conspicuous white markings. Woodpigeons are also betrayed by the loud clatter of their wings at take-off. In spring, their display flight makes them still more obvious. Their flocks gain height too slowly, and the individual birds do not keep close enough together. They are strong in level flight; they are quick to see danger from below and to swerve suddenly aside; but when attacked from above, their reaction is less violent, they dodge with difficulty, their straight flight is slow to bend. Because they are so much shot at and disturbed by man they are often forced to fly beneath the hunting hawk. They are loose-feathered and easy to pluck. In every respect they are an ideal species for the peregrine to prey upon. They are noisy, conspicuous, numerous, heavy, well-fleshed, nourishing, and not hard to kill.

Black-headed gull

White gulls are the most conspicuous of all winter birds. Against dark ploughland they are visible even to the feeble human eye when half a mile away. That is why the peregrine kills so many adult gulls, and so few juveniles. Gulls can rise quickly to evade the stoop, but they are easily driven to panic by attack from below. Their whiteness blends with the sky. It may make them invisible to the fish they live on when at sea. Relying on camouflage, perhaps they are slow to adapt themselves to unexpected danger from beneath. It was once believed that peregrines detested gull-flesh. Many gulls are killed by Finnish peregrines during the summer, and gulls are frequently taken on the coast of Norway, and in Scotland.

Lapwing

They are well hidden when feeding in a field, but the flocks always fly up when a peregrine goes over. As soon as they rise, their black and white tails are a target to the falcon’s eye. Their spring display flight makes them careless of danger and less alert to predators. They have the reputation of being hard to kill, but the peregrines I have seen have outflown them fairly easily.

Wigeon

Peregrines prefer wigeon to any other species of duck. It is the commonest coastal duck, in winter, and its broad white wing-markings and loud whistling calls make it very conspicuous. Like all duck, it flies fast and straight, but it cannot dodge easily from the stoop. In March the paired birds are slow to react to the peregrine’s approach. When wildfowling finishes in February, the peregrine kills more duck and is often seen hunting on the coast at nightfall.

To summarise, these are the characteristics that make birds vulnerable to peregrine attack: white or light-coloured plumage or markings, too great a reliance on cryptic colouring, loud repetitive calling, audible wing-beats, straight inflexible flight, prolonged and high song-flight (e.g. skylark and redshank), display and fighting by males in spring, feeding too far from adequate refuge, the habitual use of the same feeding and bathing places, flying to and from roost along known ways, the failure of a flock to bunch together when attacked.

The quantity of food eaten by wild peregrines is difficult to estimate accurately. Captive peregrines are given four to five ounces of beef daily (or its equivalent). Wild juveniles probably eat more than this. A wild tiercel will kill and eat two lapwings each day, or two black-headed gulls, or one woodpigeon. A falcon may eat two woodpigeons – though not wholly – or one larger bird, such as a mallard or a curlew.

During March, a greater variety of prey is taken, including a wider range of bird species and a surprisingly large number of mammals. Moult is beginning, and the time for migration is near. An increased blood supply is needed for the growth of new feathers. The peregrine seems to be always eating. Two birds are killed daily, as well as mice, worms, and insects.

The eyes of a falcon peregrine weigh approximately one ounce each; they are larger and heavier than human eyes. If our eyes were in the same proportion to our bodies as the peregrine’s are to his, a twelve-stone man would have eyes three inches across, weighing four pounds. The whole retina of a hawk’s eye records a resolution of distant objects that is twice as acute as that of the human retina. Where the lateral and binocular visions focus, there are deep-pitted foveal areas; their numerous cells record a resolution eight times as great as ours. This means that a hawk, endlessly scanning the landscape with small abrupt turns of his head, will pick up any point of movement; by focusing upon it he can immediately make it flare up into larger, clearer view.

The peregrine’s view of the land is like the yachtsman’s view of the shore as he sails into the long estuaries. A wake of water recedes behind him, the wake of the pierced horizon glides back on either side. Like the seafarer, the peregrine lives in a pouring-away world of no attachment, a world of wakes and tilting, of sinking planes of land and water. We who are anchored and earthbound cannot envisage this freedom of the eye. The peregrine sees and remembers patterns we do not know exist: the neat squares of orchard and woodland, the endlessly varying quadrilateral shapes of fields. He finds his way across the land by a succession of remembered symmetries. But what does he understand? Does he really ‘know’ that an object that increases in size is moving towards him? Or is it that he believes in the size he sees, so that a distant man is too small to be frightening but a man near is a man huge and therefore terrifying? He may live in a world of endless pulsations, of objects forever contracting or dilating in size. Aimed at a distant bird, a flutter of white wings, he may feel – as it spreads out beneath him like a stain of white – that he can never fail to strike. Everything he is has been evolved to link the targeting eye to the striking talon.