The Bird Watcher in the Shetlands/Chapter 2
CHAPTER II
SPOILER AND SPOILED
TO the one smooth beach that there is here come the terns, each year, to breed, and from these, as well as from the various gulls that nest upon the island, the lesser or Arctic skua—whom some call Richardson's, as though it belonged to that gentleman—is accustomed to take toll. Sweeping the sea with the glasses, one detects, here and there upon its surface, a dusky but elegantly shaped bird, that sometimes rises from the water and descends upon it again, slowly and gracefully, but is never seen to poise and hawk at fish, like the terns themselves, or, more rarely, some of the gulls. These are those skuas who elect to take their chances at sea, and whenever a tern rises after making his plunge, with a fish in his bill, they rise also and pursue him. Then may be witnessed a long and interesting chase, in the course of which the two birds will sometimes mount up to a considerable height, rising alternately, one above the other, as though each were ascending an aerial ladder. There are no gyrations in these ascents. They are, or at least they have the appearance of being, almost perpendicular, so that they differ altogether from those of the heron and hawk, once familiar in falconry, and of which Scott has given us such a splendid description in "The Betrothed," that delightful work which an obtuse critic and publisher (l'un vaut bien l'autre very often) almost bullied its author into discontinuing. The victory is by no means always to the robber bird, and I believe that if a tern only persevere long enough it has nothing to fear, for, as in the case of the black-headed gull and the peewit, with much threatening, there is never, or, to be on the safe side, very rarely, an actual assault. It almost seems as if this logical sequence of what has gone before had dropped into desuetude, and that the skua, from having long been accustomed to succeed by the show of violence only, had become incapable of proceeding beyond the show. Why, if this were not the case, should he always leave a bird that holds out beyond a certain time? It is not that he is outstripped in the chase, for the skua's activity and powers of flight have always seemed to me to be sufficient to overtake any bird of his own size, however swift, with whom he has piratical relations. Of his own size, or something approaching to it, for I have seen him altogether baffled by the smaller turns and evasions of such a comparatively feeble flyer as the rock-pipit. But this was out of the ordinary way of his profession. The rock-pipit carried nothing, and, even if he had done, it would have been too insignificant for the skua's attention. Either amusement or murder—or the amusement of murder, which is felt by birds as well as men—must have been the object here, nor does this contravene the theory I have just laid down, since such generalised and legitimate longings are only indirectly related to the bird's special instinct.
I do not myself see how these curious relations of robber and robbed could have arisen, unless there had been, from the beginning, a marked difference in the relative powers of flight possessed by each. The skua, originally, must have caught fish, like the birds on whose angling it is now dependent, and only an easy mastery over the latter could have induced it to abandon the one way of living for the other. This superiority was probably first impressed upon the weaker species through bodily suffering, but it would have been less trouble for the stronger one could it have succeeded without coming to extremities, and this, and its constantly doing so, might in time have made it forget, as it were, the last act of the drama. But say that the skua has forgotten this, then it is likely that a certain number of the persecuted birds have by practice discovered that it has, and so emancipated themselves from the tyranny. Whether this be the reason or not, I have often noticed the persistence with which some terns refuse to yield the fish, though the nearness of the skua, and its sweeping rushes, seem quite sufficient to induce them to. Those, on the other hand, who drop it quickly, often do so whilst the enemy is still at a distance, in which case the fish falls upon the water before the skua can catch it. Upon this, the latter—if not invariably, as the fishermen assert, yet certainly in the greater number of instances—flies off without any further attempt to secure it, and I have then seen the tern sweep back, and, plunging down, retake possession of its booty. Whether, in such cases, the fish was designedly relinquished, in order to be secured again, I cannot say, but here, at any rate, we see another way in which the parasite might come to be outwitted by the more intelligent of its vaches à lait.
These competitions between skua and tern, both of them birds of such swift and graceful flight, are very interesting to watch. The skua, in the midst of the chase, will frequently sweep away, as if it had abandoned all hope, and then return in a wide circling rush, at the end of which there may be a sudden upward shoot, for the tern generally seeks to elude its pursuer by rising higher into the air. Often—and again this is just as with the peewit and gull—a pair of skuas will give chase to the same tern, and then one may see the slender, shining bird quite overshadowed by the two evil figures, as, pressing upon either side, they rise or sink towards it, often almost covering it up with their broad and dusky pinions. Twin evil geniuses they look like, seeking to corrupt a soul, or else dark shadows that this soul itself has summoned up, and that attend it, hardly now to be shaken off:
Da hab' ich viel blasse Leichen
Beschworen mit Wortesmacht.
Sie wollen, nun, nicht mehr weichen
Zurück in die alte Nacht.
For imagination can easily multiply the two into many—cares, shadows, sorrows, they are easily multiplied.
A tern that either eludes or is not molested by a skua at sea, flies home with its fish, to feed its young. But here it has often to run the gauntlet of other skuas, who wait and watch for it upon the land, sitting amidst the short stunted heather, with the brown of which their plumage, as a rule, harmonises. There are, therefore, land-robbers and sea-robbers—pirates, and highwaymen—amongst these aristocratic birds, and it would be interesting to know whether the two roles are performed by different individuals, or indifferently by the same one. To ascertain this satisfactorily I have found a difficult matter, but I believe that here as elsewhere—in everything, as soon as one begins to watch it—a process of differentiation is going on.
Where there are terns to be robbed, the skuas—I am speaking always of the smaller and, as I have found it, the more interesting species—seem to prefer them to any other quarry, so that the gulls, generally, benefit by their presence; otherwise all are victimised, except, as I think, the great black-backed gull. The latter will, himself, attack the skua, who flies before him, so that, taking this and his size into consideration, it does not seem very likely that the parts should ever be reversed between them, nor can I recall any clear instance in which they were. Of all the birds attacked, the common gull—which, like common sense, seems to be anything but common—makes, in my experience, the stoutest resistance; for it will turn to bay and show fight, both in the air and on the water, when it has been driven down upon it. Generally it is able to hold its own, and I look upon it as a vigorous young Christian nationality, in course of establishing its independence against the intolerable yoke of Turkish oppression.
These skuas love brigandage so much that, amongst themselves, they play at it; swooping, fleeing, and pursuing, each feigns, in turn, to be spoiler or spoiled. So, at least, I understand it, for nothing ever comes of these mock skirmishings, no real fight or flight, or anything approaching to one. It is fun, frolic, with a sense of humour, maybe, as though two pirates were playfully to hoist the black flag at each other. I love the humour of it. I love the birds. Above all, I love that wild cry of theirs that rings out so beautifully "to the wild sky," to the mists and scudding clouds. By its general grace and beauty, by its sportings and piracies, its speed of flight and the rushing sweeps of its attack, this bird must ever live in the memories of those who have known it: but, most of all, it will live there by the inspiring music of its cry.