Nests and Eggs of Birds of The United States. Gentry Thomas George

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СКАЧАТЬ inch in diameter) shows evidence of having been forced from a horizontal position to one that is almost vertical. The latter is really the best authenticated case we have seen of the truly pensile style of nest. In most instances these structures are but partially suspended, being supported from beneath by projecting branches.

      In five or six days from the time of the assumption of matrimonial relations, the nest is started, and through the united efforts of both birds for the period of a week, is brought to completion. Although nidification usually commences about the 20th of May, from some inexplicable cause or other, this essential business is often deferred until the middle of June and, occasionally, as late as the beginning of August. But in the latter case, the birds are undoubtedly prevented by varions accidents from carrying out their designs earlier in the season. In the building of a home, either the male collects the materials, and the female weaves them into a nest, or the converse is the case.

      There is little variety noticeable in the materials that compose the nest. The generality of domiciles which we have seen from Texas, Georgia, Florida, New Jersey, Pennsylvania, and several of the Western States, have no lining, but are entirely constituted of one substance – a flexible kind of grass or reed. In a few cases we have discovered a slight lining of vegetable wool, doubtless plucked from the young and developing fronds of various species of ferns. Bits of yarn, down of seeds, and animal wool, have been mentioned by various observers as occasional linings.

      Such is the homogeneity of its texture, that once seen and recognized, it can never be forgotten or confounded. A nest from Texas is the exact counterpart of a similar structure from Pennsylvania, or of one from Michigan. The abundance of the particular species of grass out of which these birds construct their homes, and the facility with which it is obtainable in localities remote from each other, conspire to produce the resemblances which are found to exist.

      Plate IV exhibits a nest of this species which was obtained in the vicinity of Germantown, Pa., during the summer of 1880. It was suspended from the branches of a pear-tree, in the manner shown in the drawing, at an elevation of forty feet from the ground. It is built exteriorly of a peculiar kind of long, tough and flexible grass, which is common in Pennsylvania. The material is woven through and through in a very wonderful manner, and with as much neatness and intricacy as if actually done by a needle. It is hemispherical in shape, and open at the top. The external diameter is four inches, and height two and a half inches; the cavity is two and a half inches wide, and two and three-quarters in depth. The color of the outside is yellow, while that of the inside is a deep brownish-red.

      Another specimen which the writer possesses from the same locality, is built of the same material, more highly colored interiorly, but less so exteriorly. It is pouch-shaped, and measures two and a half inches in internal diameter, and four and a half inches in depth. The length is five inches, and the external diameter three inches. When in position, this nest was so placed that the short spurs of the pear upon which it was built, with their beautiful green wreaths of leaves, met and roofed it over, thus constituting a natural covering for the protection of the young during the prevalence of inclement weather.

      Dr. Brewer describes a nest taken by Mr. Brandigee in Berlin, Conn. This structure was elaborately and skilfully woven of long green blades of grass, lined on the inside with bits of yarn, animal wool, and a woolly substance of purely vegetable origin. In external diameter and height it measured four inches; in depth, three inches, and in internal diameter three and a half inches – being widest in the middle. Specimens, similarly colored, have been frequently observed in Pennsylvania.

      By far the most remarkable structure which we have seen is the one we are about to describe. This domicile was built in a red or swamp maple, at an elevation of nearly thirty feet from the ground. It is a double nest, composed entirely of long, flexible, yellow grasses, and securely fastened between three nearly vertical branches, in a linear direction. The main nest is inversely sub-conical, four inches high, with an external diameter of three and a half inches in the middle, and four at the top. The diameter of the cavity is three inches, and the depth two and three-fourths inches. The smaller is joined to the first by a continuation of the grasses of the latter, is somewhat similarly shaped, but less compact in structure. The height is one and three-fourths inches, external diameter in the long direction three and one-fourth inches, and in the short, but two inches. The depth of the cavity is one and three-fourths inches, and the width, one and a half inches. In one side there is a circular hole one inch in diameter. Various opinions have been ventured as to the object of this additional structure. Some have contended that it was never intended for occupancy or ornament, but is simply a fabric which the authors have failed to complete. But its completeness and finish operate against such a theory. The writer, as well as others who have witnessed this curious specimen of mechanism, are convinced that it was erected for a special purpose – namely, the accommodation of either parent while the other is sitting. The opening alluded to, served for the head of the nonsitting bird, who, from his position, looking away from the main building, could detect the approach of enemies, like a sentry upon an outpost.

      The nest being completed, on the following day the female begins to deposit her complement of three or four eggs, at the rate of one egg daily. Incubation now ensues, sometimes on the day of the last deposit, but generally on the morrow. This duty lasts from fourteen to fifteen days, and is wholly the work of the female. While she is thus occupied, the male stands guard over the nest, or acts the part of a dutiful and affectionate husband, by providing her with the necessary food. Should their home be disturbed by feathered assailants, or by man, the female leaves the nest, and by loud cries and menacing gestures, seeks, with the assistance of her partner, to drive off the intruders. Often the attack is carried on with a boldness and determination that challenge admiration.

      The love for offspring is very intense, and manifests itself in unwearied devotion, and the tenderest solicitude. From early morn until dusk, one parent or the other is constantly on the go for appropriate articles of fare. Usually but one is absent at a time on this important business. But the demands for food are so pressing, that both are sometimes compelled to leave home, but only for a short time, and then never beyond seeing distance of the nest. At first the young are fed upon smooth caterpillars, aphides, spiders, ants, butterflies, and dipterous insects; but as they mature, small beetles and other hard-shelled articulates are added to their varied and extensive menu. At the age of fifteen days, they quit the nest, receive instructions in ærial navigation under the tutorage of the paternal head, and in ten days more, are prepared to shift for themselves.

      One peculiarity of this species must have struck the attention of every careful observer of its habits; that is, its remarkable sociability. Audubon cites a case where no less than nine pairs were found breeding in the same enclosure. We have known instances where as many as five nests, all occupied, were crowded in the same orchard, within a short distance of each other. The most perfect good feeling and harmony prevailed in this little colony, the birds mingling together with the freedom and ease of inhabitants of the best regulated human communities.

      The eggs are oblong-oval in form, pointed at one extremity, and marked with pale purple blotches and a few deep dark purplish-brown dashes upon a light bluish-white background. Specimens from Washington measure .85 by .62 of an inch; from New Mexico,79 by .54; and from Pennsylvania,88 by .58.

      Plate V. – TYRANNUS CAROLINENSIS, Baird. – Kingbird

      The Kingbird, or Bee Martin, has an extensive range, being found during the summer throughout the continent of North America, from Texas and Florida in the south, as far as the 57th parallel of north latitude. Westward, north of the 44th parallel, it ranges from the Atlantic seaboard to Oregon and Washington on the shores of the Pacific.

      Its arrival in the United States from Mexico, Central and South America, and tropical Cuba, where it winters, generally occurs during the early part of April. Having taken the step, the birds are not long in spreading themselves over their immense breeding-grounds, which have been found to be co-extensive with the whole territory over which they range. They reach the Middle Atlantic States from the СКАЧАТЬ