Читать книгу Nests and Eggs of Birds of The United States - Gentry Thomas George - Страница 10

The Downy Woodpecker, or Lessee Sapsucker as it is called byway of distinction, is a resident rather than a migratory species, and is known to breed wherever it is found. Its area of distribution extends from Lower Louisiana to Labrador, and from Texas northward through New Mexico and the Indian Territory to the 58° of latitude. It is also quite common in the maritime parts of Alaska, the Aleutian Islands excepted. Although abundant east of the Rocky Mountains, and rather more numerous than its nearest kin, the Larger Sapsucker, yet, owing to the smallness of its size, it is not so well known outside of cultivated districts.

In the autumnal and winter months, these birds lead solitary lives. Go where we will, then, we may here and there behold isolated individuals busily probing the fissured bark of trees for the eggs and pupa of insects. Even the mature forms meet with the same cruel treatment.

Though rarely observed in cultivated districts during these times, yet a visit to the woods will reveal many a little fellow in dappled dress arrayed, with or without a crown of red, wending his slow and labored flight from tree to tree, or waking the clear echoes of rock and shady glen with his shrill music and weird drumming.

But when balmy Spring returns, and releases the earth from the icy fetters of the winter-god, and peoples our shade and fruit trees with countless insect existences, then quits he the wild forest scenery, in a measure, and betakes himself to our lawns and orchards. This is not always the case. For in those lands where civilization has not planted, but where Nature still reigns in her pristine glory, lie is the same changeless creature as when first he greeted the vision of man.

'Tis now the social forces, freed from the frozen bonds of winter, rejoice in new vitality. The sexes no longer shun each other as before, but mingle in the most friendly manner. The male is the first to show symptoms of change. He pursues his predatory exploits with less of his characteristic zeal, and seeks to attract the attention of the gentler sex. With this object in view, he arranges his toilet with scrupulous nicety, and then goes forth to parade his beauties and grace before a bevy of idle, listless females. Ever and anon, he varies his occupation, by the rendition of a song. But his auditors seem either incapable of appreciating his efforts to please, or else are too much concerned with other matters to pay any real attention thereto.

Our little hero, not to be baffled, keeps up his courage, and with a patience truly praiseworthy, continues his suit, till at last he reaches the ear of some simple-minded female, when he pours forth, with all the resistless eloquence of his being, the short but pleasing narrative of his love.

Should his affection be requited as it deserves, the happy lovers, without further ado, hie themselves away to sunny field or shady grove, to enjoy a brief honey-moon, preparatory to entering upon the trying and responsible duties of wedded life.

The getting of a wife is not always so easily accomplished. It is generally attended with many trials and vicissitudes of fortune. Sometimes when success seems ready to crown the efforts of an actor in this part of life's drama, a rival comes upon the scene, and claims the attention of the wooed. The most ridiculous antics now ensue, and continue for hours together. The female becomes the most whimsical of creatures, lavishing her caresses first upon one, and then upon the other of her suitors. The jealousy of the contesting males now knows no bounds, and only vents itself in long and fierce encounters. The female, at last, comes to the rescue, desists from her meaningless flirtation, and bestows the jewel of her affections upon her first lover. The combat ceases, and the participants separate.

Occasionally, several pairs will meet by chance upon the same tree, when similar scenes will be enacted by the jolly females, much to the vexation of their respective suitors. These farces have been known to last for nearly a week, but they seldom continue for a longer period than two days.

Mating having taken place, which is usually the case during the first week of May, never earlier except when the season is remarkably advanced, the birds make ample amends for the time thus seemingly frittered away, by the perseverance and diligence with which they ransack the orchards and groves for a suitable tree in which to excavate a nest.

The selection of a site is a matter of no little importance, the greater part of a week being consumed in making the necessary reconnoissances. These explorations commence early in the morning, and continue with but few interruptions until the close of the day. They are never performed singly, but always in pairs. One feature thereof strikes us as peculiarly interesting, and as deserving of mention. It is the perfect harmony and good-will which then prevail.

If a situation is discovered by one of the parties which is apparently suitable, a conference is called, and the various advantages thereof discussed. If mutually agreeable, further examinations cease, and building operations are begun. In cultivated grounds, a decayed branch of the apple or cherry is chosen for this purpose; but in more retired situations, the maple, ash, elm or tulip-tree is given the preference.

In the Southern States, nest-building commences about the middle of April; in the Middle Atlantic, seldom later than the fifteenth of May; in New England, from the fifteenth of May to the tenth of June; and in the extreme northerly portions of its habitat, about the fifteenth of the latter month.

All things being in readiness, the male is the first to commence operations. Stationing himself upon the spot which is to constitute the doorway to his home, with claws imbedded in the wood to prevent from falling, he digs the bark away in the form of a semi-circle. Then reversing his position, he goes through the same difficult but trying task, his little bill his only implement of execution, until he has wrought a perfect circle. Continuing the labor, he delves away into the soft or hardened interior, like a veritable Trojan, until an inch or more of the wood has yielded to the blows of his small but powerful chisel. Tired, at last, he resigns the work to his companion, and settles himself upon a branch close-by to rest. Having recuperated his exhausted energies, he starts off in quest of food, but to return in the course of a half-hour to the relief of the female. Thus the work goes on, day after day, with an industry and patience truly commendable, until success crowns the undertaking.

The opening to the chamber is perfectly circular, and quite as accurate as a skilful mechanic could make it with compasses. The cavity is first directed downwards at an angle of forty degrees, for the space of five inches, when it takes a perdendicular course for nearly ten inches further, widening perceptibly at the bottom. Such is the capacity of the latter that the sitting-bird is able to turn around therein with considerable ease, but the external orifice is just large enough to admit the bodies of herself and partner.

Few species are more careful to direct attention from the scene of their labors than the subjects of our sketch. The chips produced during the work of excavation are usually carried to some distance, so as to remove all traces that might lead to detection. But howsoever clandestinely they may act, and whatever precaution they may exercise, their home does not always escape the keen eye of the experienced oologist, or the sharpness and sagacity of the mischievous and insinuating little House Wren – one of the most annoying enemies with which it has to contend.

Wilson gives an interesting account of the impudent coolness of this bird, who coveting the neatly built home of this Woodpecker, and powerless to construct such an apartment for herself, waits until the Wookpeckers have finished their work, when she attacks them with violence, and expels them from the nest which they have prepared with so much pains. Another example is mentioned by the same distinguished authority. In this instance, the Woodpeckers had commenced the work of excavation in a cherry-tree, within a few yards of the house in which he lived, and had made considerable progress, when they were assailed by the Wrens, and compelled to withdraw. They then began a second nest in a pear-tree, a few yards off' when after digging out a most complete chamber, and laying one egg, they were once more attacked by the same impertinent intruder, and finally forced to desert the place.

Having constructed their home, which is usually the work of a week, the female, after a day of recreation and rest, begins the labor of oviposition.

This continues for four or six days, the time being regulated by the number of eggs which is to constitute a setting, but a single egg being deposited daily. Incubation now follows, and is the exclusive task of the female for nearly twelve days. The male, although he takes no direct part in this business, is an important factor in the successful accomplishment of the undertaking, as he, like an affectionate and dutiful husband, supplies her with the necessary food. When not thus occupied, he may be seen foraging the fields and woods, or perched upon a twig in the calm enjoyment of ease and sober thought, He is seldom to be observed in the immediate vicinity of the nest, save when carrying food to his mate, or in times of great calamity. It has been affirmed by Mr. Paine, of Randolph, Vermont, that the male occasionally constructs a hole for himself close-by that of his mate, as he has taken males in such apartments which were always unoccupied by eggs. He thinks that they repair thither for shelter. Careful explorations for several years have failed to show us that any such protection is practised in the Middle States, nor do we find any record to substantiate this statement.

The young, when first hatched, are very helpless creatures, and require the greatest care and attention from parental hands, so to speak. Caterpillars, small moths, aphides and beetles constitute the bulk of their fare, from the time they leave the egg until they are four weeks old, when they quit the nest, to be instructed in the ways of the outside world. For a fortnight the young birds rove in company, but finally separate, each bird leading the life of a recluse.

The eggs of this species are nearly spherical, of a crystalline whiteness, and measure .82 of an inch in length, and .71 in width. Specimens from Eastern Texas and Southern Michigan differ but little, if any, from others obtainable in New England and the Middle sections of our country. In the Plate the eggs are shown in position, the wood being cut away over the bottom of the chamber, to produce this result. The egg in front, as well as the birds upon the branch, are three-fourths of the natural size. The remaining eggs are in part concealed, and do not show so fully. In the southern and middle portions of the range of this Woodpecker, two broods are annually raised, one in June, and the other in August, but further north seldom more than one.