The common guillemots are scarce. Their great haunt in this vicinity is the Stack. There they are to be seen in myriads on the perpendicular side of the rock facing the west. Only two or three pairs take up their abode on the island; in fact their numbers scarcely entitle them to be called Sule Skerry birds. The few young ones I have seen are carried to the water as soon as they are hatched—at least they disappear the same day. Black guillemots or tysties are plentiful. Their time of arrival is about the middle of March, but they are rarely seen ashore before the end of April. Their nests are to be found in out-of-the-way crevices or under stones, and are not easily discovered on account of the extraordinary watchfulness of the birds and their care not to be caught on or near their nests. They lay two eggs, and the young are fully feathered before going afloat. They remain about the island till the end of September. [Illustration: _Oyster-catcher._] The first of all the visitors to arrive are the oyster-catchers. They first put in an appearance about the end of February, when their well-known cry denotes that the long, dreary winter is over. They spend their time till the end of March chiefly feeding along the coast-line; but after that time they pair, and are seen all over the island. About the end of May they lay three eggs in a nest composed of a few small stones; and when the young are hatched the noise of the old birds is perfectly deafening on the approach of an intruder, and even when no one is annoying them the clamour they make almost amounts to a nuisance. On calm, quiet nights it is hardly possible to sleep for them, and one feels inclined to get out of bed and shoot them down wholesale. The young leave the nest as soon as hatched, and are rarely seen, for on hearing the warning cry of the parent bird they at once hide among the long grass or under stones, and on one occasion I found a pair some distance underground in a rabbit’s hole. They all leave the island during the first half of September. Next to the puffins in numbers are the terns—the Arctic terns. They are also like the puffins in the regularity of their arrival at the island. When first seen they are flying high up, and they continue doing so for a day or two, only resting at night. There are several varieties of terns scattered all over the British Isles, but in the north the most numerous are the Arctic and the common tern. The latter rarely visits the island. [Illustration: _Arctic tern._]