THE MOCKING BIRD (Mimus polyglottus).
The MOCKING THRUSHES (Mimi) constitute a family nearly allied to the birds above described. They are recognisable by their slender bodies, and short but strong wings, that only extend as far as the base of the long tail, and have the third, fourth, and fifth quills of equal length. The exterior tail-feathers are graduated, the tarsi high, the feet large and powerful, and the claws comparatively weak. The beak somewhat resembles that of the True Thrush, but is much higher and more arched; the plumage, moreover, is unusually soft and lax. Unlike the True Thrushes, the members of this group do not prefer forests or woodlands, but frequent open tracts, marshy districts, or even the sea-coast; and while some seek the retirement of the most isolated situations, others make their home close to the dwellings of man. Such species as inhabit the southern portions of the western hemisphere do not migrate, whilst those from the north, when winter approaches, wander southward as far as the United States or even Central America. All American writers speak with enthusiasm of the song of these birds; and though we are by no means inclined to allow them the superiority over their European cousins that has been claimed for them, still we are fully prepared to acknowledge that their vocal powers are eminently fascinating and remarkable.
THE MIMIC THRUSH.
The MIMIC THRUSH, or MOCKING BIRD (Mimus polyglottus), as the most celebrated species has been called, is nine and a half inches long and thirteen and a half broad; the plumage on the upper part of the body is dark grey, shaded with brown upon the brow and side of the head; the under side is brownish white; the quills and wing-covers are brownish black, and the feet dark brown. The female is browner and darker than her mate, and the white in the tail less pure. Both sexes are alike in size.
The United States of North America must be regarded as the native land of this interesting bird, and from thence, as autumn approaches, it wanders forth to visit the surrounding countries. (The Mocking Birds of Louisiana, however, form an exception to this rule, as, owing to the mildness of the climate, they often remain there throughout the entire year.) This delightful songster generally frequents plantations, gardens, and brushwood, and not only lives but breeds in the immediate vicinity of man; it also prefers sandy plains, the banks of rivers, and the neighbourhood of the sea-coast. On the ground its movements resemble those of the True Thrush, but its flight is undulating, and rarely sustained for any great distance, as the Mocking Bird from time to time takes rest upon a tree before proceeding on its way; moreover, as it flies, the tail is alternately expanded and closed. As regards the wonderful powers of song that have rendered this species so famous, we cannot do better than quote the words of Wilson:—"The intelligence he displays in listening and laying up lessons from almost every species of the feathered creation within his hearing is really surprising, and marks the peculiarity of his genius. To his other endowments we may add that of a voice full, strong, and musical, and capable of every modulation, from the clear mellow tones of the Wood Thrush to the savage scream of the Bald Eagle. While in measure and accent he faithfully follows his originals, in force and sweetness of expression he greatly improves upon them. In his native groves, mounted on the top of a tall bush, or half-grown tree, in the dawn of dewy morning, when the woods are already vocal with a multitude of warblers, his admirable song rises pre-eminent over every competitor. The ear can listen to his music alone, to which that of all others seems a mere accompaniment. Neither is his strain altogether imitative. His own native notes, which are easily distinguishable by such as are well acquainted with those of our various song birds, are bold, full, and varied, seemingly beyond all limits. They consist of short expressions of two, three, or at most five or six syllables, generally interspersed with imitations, all of them uttered with great emphasis and rapidity, and continued with undiminished ardour for half an hour or an hour at a time. His expanded wings and tail, glistening with white, and the buoyant gaiety of his action, arrest the eye as his song most irresistibly does the ear; sometimes he sweeps round with enthusiastic ecstasy, mounting and descending as his song swells or dies away, and, as my friend Mr. Bartram has beautifully expressed it, 'He bounds aloft with the celerity of an arrow, as if to recover or recall is very soul expired in the last elevated strain.'
"While thus exerting himself, a bystander destitute of sight would suppose that the whole feathered tribe had assembled together on a trial of skill, each striving to produce his utmost effect, so perfect are his imitations. He many times deceives the sportsman, and sends him in search of birds that perhaps are not within miles of him, but whose notes he exactly imitates; even birds themselves are frequently imposed on by this admirable mimic, and are decoyed by the fancied calls of their mates; or dive with precipitation into the depth of thickets, at a scream of what they suppose to be the Sparrow Hawk."
As may readily be imagined, the sounds imitated by these remarkable birds vary according to the situation in which they live; those that occupy woodland districts naturally repeat the note uttered by their feathered companions, whilst those near a farmyard learn not only to imitate the cries of all its different inhabitants, but reproduce them so perfectly as to deceive the nicest ear. Thus they have been known to summon the house-dog, by whistling like his master; drive a hen to a state of the utmost excitement, by constantly screaming out in such a manner as to lead her to suppose that one of her chicks was in the last agonies; or to scare away a whole flock of poultry by the perfection with which they imitate the cry of one of the many tyrants of the air. The clapping of a mill, a creaking door, the grating of a saw, or, indeed, any of the multitudinous noises heard in a busy household, at once attract their attention, and are simulated with such torturing exactness as often to render the Mocking Bird, when caged, almost unbearable.
Amongst the many enemies to whose attacks this species is exposed, the black snake is one of the most formidable, and frequent and terrible are the battles that ensue between these apparently very unequal combatants.