In whatever way you walk, at whatever hour, the birds are sweetly calling in the way-side oleanders and the wild sage-bushes and the cedar-tops. They are mostly cat-birds, quite like our own; and bluebirds, but of a deeper blue than ours, and redbirds of as liquid a note, but not so varied, as that of the redbirds of our woods. How came they all here, seven hundred miles from any larger land? Some think, on the stronger wings of tempests, for it is not within the knowledge of men that men brought them. Men did, indeed, bring the pestilent sparrows which swarm about their habitations here, and beat away the gentler and lovelier birds with a ferocity unknown in the human occupation of the islands. Still, the sparrows have by no means conquered, and in the wilder places the catbird makes common cause with the bluebird and the redbird, and holds its own against them. The little ground-doves mimic in miniature the form and markings and the gait and mild behavior of our turtle-doves, but perhaps not their melancholy cooing. Nature has nowhere anything prettier than these exquisite creatures, unless it be the long-tailed white gulls which sail over the emerald shallows of the landlocked seas, and take the green upon their translucent bodies as they trail their meteoric splendor against the midday sky. Full twenty-four inches they measure from the beak to the tip of the single pen that protracts them a foot beyond their real bulk; but it is said their tempers are shorter than they, and they attack fiercely anything they suspect of too intimate a curiosity concerning their nests.