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
