I shall try to make plain the bloodiness of killing. Too often this has been slurred over by those who defend hawks. Flesh-eating man is in no way superior. It is so easy to love the dead. The word ‘predator’ is baggy with misuse. All birds eat living flesh at some time in their lives. Consider the cold-eyed thrush, that springy carnivore of lawns, worm stabber, basher to death of snails. We should not sentimentalise his song, and forget the killing that sustains it.
In my diary of a single winter I have tried to preserve a unity, binding together the bird, the watcher, and the place that holds them both. Everything I describe took place while I was watching it, but I do not believe that honest observation is enough. The emotions and behaviour of the watcher are also facts, and they must be truthfully recorded.
For ten years I followed the peregrine. I was possessed by it. It was a grail to me. Now it has gone. The long pursuit is over. Few peregrines are left, there will be fewer, they may not survive. Many die on their backs, clutching insanely at the sky in their last convulsions, withered and burnt away by the filthy, insidious pollen of farm chemicals. Before it is too late, I have tried to recapture the extraordinary beauty of this bird and to convey the wonder of the land he lived in, a land to me as profuse and glorious as Africa. It is a dying world, like Mars, but glowing still.
PEREGRINES
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