Читать книгу Nests and Eggs of Birds of The United States - Gentry Thomas George - Страница 9

The Towhee Bunting, or Ciieavink, has an extended distribution throughout the eastern portions of the United States, ranging from Florida and Georgia on the south-east to the Selkirk settlements on the northwest, and westward to the border of the Great Plains, where it is replaced by closely allied races. It breeds wherever found, certainly in Georgia, and, doubtless, in Florida, although sparingly.

According to Wilson, it is found in the middle districts of Virginia, and thence south to Florida, during the months of January, February and March; but as the weather grows mild, and Nature begins to don her livery of green, many forsake these haunts, and wing their flight to distant localities; reaching the Middle Atlantic States about the fifteenth of April, Massachusetts and Connecticut towards the last of the month, Maine and New Hampshire early in May, and the North-western States a little later.

In some regions the birds arrive singly, but retire in small flocks. This is the case in the vicinity of Washington; whereas in Eastern Pennsylvania, they are somewhat gregarious for a week or ten days after their arrival, when they separate, and lead solitary lives. Their sole object now is the acquirement of food. For this purpose they repair to waste fields and damp thickets, or to small patches of underbrush along frequented roads. Here their simple song may be heard during the intervals of feeding, with scarce an intermission, from five o'clock in the morning until eight in the evening, by the early or belated pedestrian. In rain or in sunshine, or at noonday in the hottest weather of the season, the woods resound therewith, or with that peculiar note of complaint from which the species has received the name Chewink.

There is an expression of cheerfulness in these notes, though they are not delivered with that enthusiasm which characterizes the songs of many of our species. But music, like poetry, must be of a somewhat plaintive nature, if it would take firm hold of the feelings.

After a period of three or four weeks mostly spent in feeding, the males seem to tire of such a life, and seek to attract the attention of the females. Perched on the lower branch of a tree, near the edge of a wood, or 011 the summit of a small tree or tall bush in the midst of a thicket, or hid from view by clusters of bushes, they may be heard pouring forth, with all the fervor of their being, their strange madrigals. At first, their efforts to captivate are unheeded. But patiently and persistently the singing is kept up in a quiet, simple manner, until their auditors become impressed, and modestly quit their shady retreats to encourage the musicians by their presence. Having gained this advantage, they follow it up, and in less than a week from the time the first note was uttered, have mastered the situation. The females wholly entranced, yield to the persuasions of their would-be lords, and conjugal relations are entered into. This generally occurs not later than the fifteenth of May. But the happy couple are not yet ready to begin nest-building. They must needs celebrate the occasion of their marriage. Accordingly, they set out on a wedding-trip, so to speak, visiting adjoining lots and thickets, and enjoying the delights and scenes around them. This continues for four or five days, when the lovers, thoroughly surfeited, return and quietly settle down to prosy life.

The erection of a home is now the absorbing topic of interest and conversation. Where to build, and how, are matters that are agitating their minds, and which seem, judging from the actions of the parties interested, very difficult questions to adjust. After no inconsiderable portion of time thus spent, and with little possibility of coming to any decision, a separation ensues, and the country scoured for miles around.

Should a situation which seems eligible be discovered by either party, the other, by a peculiar signal, is called to the spot, and the advantages thereof carefully discussed. If satisfactory, it is accepted, and building operations commenced. Otherwise, the search is commenced anew, and continued until one is obtained which is mutually pleasing. But where the birds are unmolested, the same localities are probably selected on each return of the breeding-season. The situation generally chosen is a small thicket with a dense growth of underbrush, or a high piece of ground overrun by brambles, and dotted by patches of fern. Latterly, nests have been frequently found in clumps of tall grass, in fields once swampy in character.

In New England, the locality usually chosen is a low, dense woods, thickets of briers and bushes near streams of water, or the "scrub," which is a low or bushy "growth" of trees, chiefly of oaks and birches, occurring in dry, hilly lands once occupied by pines. In the extreme northern limits of its range, dry uplands, near the edges of woods, or high tracts covered with a. low brushwood, are used, rather than low or moist grounds, as was the case in some sections at the time when Wilson wrote. The love for such situations doubtless gave rise to the appellation of "Swamp Robin," which is generally applied to this species in Pennsylvania.

When placed within a thicket, or in the borders thereof, the nest is either built in a depression of the ground, usually beneath a bunch of grass, in a pile of old brush or fagots, or on a slight prominence surrounded by tall, graceful ferns. Within a concavity, the structure is made to project slightly above the margin thereof, and is artfully concealed from the gaze of intruders by dry leaves. So completely is it hidden, that all efforts to find it frequently prove unavailing.

The work of building is entered into with diligence and alacrity, each bird collecting and adjusting the materials as it thinks best. While thus engaged – which is usually from sunrise to sunset, allowing the necessary time for foraging and rest – the architects seldom, if ever, get at outs, but labor with a purpose, and in the best of spirits. The time thus spent has never been known to exceed three days.

So little variation is manifested in these structures, that specimens from the Southern States resemble those from the Eastern, Middle and Western sections so closely, as to be readily identified by persons of the least experience in such matters.

A typical nest is mainly composed of the leaves of deciduous trees, twigs, grass and roots, 011 the outside, and is lined with the inner fibres of the wild grape-vine, or with fine stems of grasses. The drawing represents it as being constituted of the stems of grasses, with a slight intermixture of leaves and roots, and as having a lining of reddish-brown stems of the same. It measures four and a half inches in extreme diameter, and two and a half in height. The internal diameter is two and three-fourths inches, and the depth of cavity one and a half.

Oviposition commences on the day succeeding the completion of the nest, and proceeds at the rate of one egg daily, until the entire complement is deposited. Incubation closely, follows, usually a day or two after the last egg is laid. This is undoubtedly the exclusive task of the female for a period of thirteen days. Diligent and close watching has failed to show that the male takes any direct part in this important business. Although seemingly averse, or unaccustomed to this kind of work, he does not fail to contribute his share to the success of the undertaking. While his wife is engaged in sitting, he is an ever watchful and cautious husband. Unlike many other species, he does not make himself too conspicuous, but stations himself some distance from the nest, for fear of revealing its whereabouts, and only ventures into the neighborhood at certain regular periods, to receive the commands of his patient little house-wife, or to administer to her bodily wants. Though shy, these birds often seem saucy; and, while one person complains of their chirruping to and starting his horse, another claims that, 011 the discovery of their nest, they express their grief so impudently as to arouse his indignation. But when the nest lias been stumbled upon by some cruel oologist, and the female is compelled to abandon it and seek safety in flight, the male does not even then desert his hiding-place to come to her rescue. Everything is left to her judgment, and well does she play her role in the drama. By various strategic movements, such as imitating the actions and cries of a crippled bird, she decoys the inexperienced intruder to a remote distance, when she flings off' the veil of hypocrisy, and quickly disappears in the bushes. With the trained collector this ruse hardly succeeds, and the disappointed parent often beholds with profound sorrow the discovery of her nest, and its destruction by ruthless hands.

When the young are hatched, they are watched over with jealous care, and receive more than ordinary attention. Grubs, earthworms, plant-lice and larvæ of butterflies, in immense numbers, are daily gleaned, and fed to their hungry appetites. Such are their demands for food, during the first week or ten days of existence, that the parents are kept extremely busy in catering thereto. Occasionally, both are absent from home 011 this important business, but the rule seems to be for one parent to keep a watch over it and its helpless inmates, while the other is thus occupied.

At the age of thirteen or fourteen days, the young quit the nest, and receive their first lessons in the mysteries of bird life; and, in ten days more, are forced to shift for themselves, but are permitted, however, to remain with the parents until the time of the autumnal migration, when they help to form the small flocks which are seen flying southward about the middle of October.

The eggs of this species are four in number, rounded-oval in shape, and are covered over the entire surface with dots and blotches of reddish-brown upon an obscure grayish, or reddish-white background. In some specimens, these dots run into each other; and, in others, they are distinct, being more profusely collected about the larger extremity. The average measurement of a score of specimens from widely-separated localities is .97 by .80 of an inch. Such is the resemblance which obtains between these eggs and those of the Brown Thrush, that when sets of both are placed together in a tray, the difference between them would scarcely be apparent to a novice in such matters. It remains for the keen and critical eye of the more advanced student to point out the distinction, which consists in the paler and more roseate tint of the Chewink's eggs, and the larger size of those of the Thrasher. Wherever observed, these birds seem to be single-brooded, although nests are sometimes found with young, in June and August, which fact would seem to argue that occasionally more than one brood is reared; but, generally, the first brood leaves the nest too late for another to be brought out before the appearance of the early frosts.