ROCK DOVE.
We here have another exclusively marine species, the Columba livia of Linnæus and most modern writers, confined to such portions of the coast as are precipitous and full of caves and hollows. The Rock Dove may be readily distinguished from all the other British species of Pigeons by its white lower back and rump, and strongly-barred wings. As may naturally be inferred from the cliff-haunting propensities of this Dove, it is practically absent from the low-lying eastern coasts of England, local on the south coast, but becomes much commoner further north and west, where the cliffs are rugged and lofty, and full of those wave-worn hollows and fissures that are the Rock Dove’s delight. As most readers may be aware, this species is the original stock from which the numerous races of dovecot Pigeon have descended. Curiously enough, this bird is inseparably attached to the coast; it is a rock-haunting species, and one which rarely or never perches in trees. Usually our first acquaintance with the Rock Dove is made as the startled bird dashes out of the cliffs, with rattling wings and impetuous haste. It is more or less gregarious all the year round, and may frequently be seen in flocks on the fields near its native cliffs. Its food is composed of grain and seeds of all kinds, and the buds and shoots of plants. Its flight is rapid and well sustained. I was told by the natives of St. Kilda that the Rock Doves frequenting the islands cross the sea every day—a distance of seventy miles—to feed on the Hebrides, and there can be little or no doubt about this, for St. Kilda contains little suitable food for this grain-loving bird. Its note is the familiar coo.
The Rock Dove is an early breeder, congregating in colonies on such cliffs as afford it the necessary shelter. Wherever possible the nests are made in caves; where these are wanting the birds scatter themselves about the cliffs, and place their nests in any convenient fissure or cleft. The bird pairs for life, and yearly resorts to the same breeding stations, some of the caves gaining a local reputation in this respect. The nest is placed on some ledge or in a cranny, and consists of a little dry grass, twigs, roots, or stems of plants, arranged in a flat plate-like form. The two eggs are pure white. This species may be found breeding all the summer through, and rears two, if not more, broods each season. The Rock Dove is found on almost all parts of the rocky coasts of Europe and the outlying islands.