When both birds are at home, the one that stands on the rock, by or near the nest, is ready to guard it from all intrusion. Should another bird fly on to the rock and alight, in his opinion, too near it, he immediately advances towards him, shaking his wings, and uttering a low grunting note which is full of intention. Finding itself in a false position, the intruding bird flies off; but it sometimes happens that when two nests are not far apart, the sentinels belonging to each are in too close a proximity and begin to cast jealous glances upon one another. In such a case neither bird can retreat without some loss of dignity, and, as a result, there is a fight. I have witnessed a drama of this nature. The two locked their beaks together, and the one which seemed to be the stronger endeavoured with all his might to pull the other towards him, which the weaker bird, on his part, resisted as desperately, using his wings both as opposing props and to push back with. This lasted for some while, but the pulling bird was unable to drag the other up the steeply-sloping rock, and finally lost his hold. Instead of trying to regain it, he turned and shuffled excitedly to the nest; and when he reached it, the bird sitting there stretched out her neck towards him, and opened and shut her beak several times in quick succession. It was as if he had said to her, “I hope you observed my prowess. Was it well done?” and she had replied, “I should think I did observe it. It was indeed well done.” On the worsted bird’s ascending the rock to get to his nest, the victorious one ran, or rather waddled, at him, putting him to a short flight up it. This bird was also cordially received by his own partner, who threw up her head and opened her bill at him in the same way, as though sympathizing, and saying, “Don’t mind him; he’s rude.” In such affairs, either bird is safe as soon as he gets within close distance of his own nest; for it would be against all precedent, and something monstrous, that he should be followed beyond a charmed line drawn around it. EDMUND SELOUS. (_From “Bird Watching” and “The Bird-Watcher in the Shetlands.” J. M. Dent and Co. By permission._) THE BIRDS OF SULE SKERRY. Sule Skerry is a tiny, barren, surf-bleached islet, lying far out in the open ocean, thirty-two miles west from Hoy Head, about the same distance from Cape Wrath, and thirty miles from the nearest land, Farrid Head, in Sutherlandshire. The Skerry, roughly rhomboidal in outline, is about half a mile in length and a quarter of a mile in its greatest width, and attains a height of only forty-five feet in its central part. All round the shore is a belt of bare, jagged rock, where the wash of the great Atlantic waves prevents any vegetation from finding a foothold, and of the thirty-five acres or so which form the entire area of the island only some twelve are covered with a mossy, vegetable soil.