The flight is rapid and sustained, but in the nesting season, and occasionally at other times, an upward soaring flight is indulged in over their nesting home. Its food consists chiefly of grain, seeds, beechmast, and acorns; but at certain seasons, especially when the snow is on the ground, large quantities of green food are eaten, tender turnip tops being much sought after.
The adult is a delicate bluish grey all over, having a violet green metallic patch on the sides of the neck, bounded on each side by a patch of white. The breast is a rich vinous purple. Tail and wing feathers nearly black. Bill yellow; legs red. The sexes are alike; and the young resemble their parents, but are duller in colour and lack the metallic and white patch on the sides of the neck. Length 17 in.; wing 10 in.
THE STOCK DOVE
Columba œnas, Linnæus
The Stock Dove is rather smaller and considerably less common than the previous species, but is nevertheless by no means uncommon in England, and has greatly increased of late years, especially in Scotland. In Ireland it is still a rare and local species. The name “Stock Dove” is not due, as many erroneously suppose, to its being the race from which our domestic Pigeons spring, but to its habit of nesting in the stocks and boles of old timber. Such places are, however, by no means exclusively used, for it also nests in caves, ledges of cliffs, and rabbit-burrows. Otherwise its habits are not materially different from those of the Wood Pigeon. As a rule it goes about in pairs, and large flocks are never met with, even when migrating from its more northerly breeding quarters.
It is a smaller and duller bird than the Wood Pigeon, lacking the white spot on the neck; while the vinous purple on the breast is not nearly so bright. There are traces of two indistinct wing bars. Length 13·5 in.; wing 8·8 in.
STOCK DOVE
Columba œnas
THE ROCK DOVE
Columba livia, J. F. Gmelin
The Rock Dove is the original species from which most of our domestic varieties have been derived. It is only on the wildest and most inaccessible parts of our coast that this species can now be found in its pure state, as in all the more inhabited portions it has become interbred with feral domestic birds. It is a resident with us, breeding in caves along the coast, although on the Continent it also frequents inland and mountainous regions. The nest, built of sea-weed, is placed on a small ledge near the roof of a cave, those into which the sea comes up with each tide being chosen by preference.
They breed very early, and at least two broods are reared in a season, and in small caves which are only tenanted by one pair, two nests may often be found and are used alternately, the second clutch being usually laid before the young of the first brood are ready to fly. It is worthy of note that in this and many other species, where for the young to move from the nest before they are fledged would mean instant death, they remain actually in the nest itself till fully fledged, and do not take their first flight till they are almost as strong on the wing as the old birds.