The eggs are oval in form, of a dark emerald green color, very highly polished, and measure .97 of an inch in length, and .68 in width. There is small chance of confounding this with any other American bird's eggs—certainly after a specimen has been once seen. Dr. Abbott, as quoted by Ernest Ingersoll, once discovered a nest, at Trenton, N. J., that contained purely white eggs, which hatched in due time into perfect young. Similar instances are known in the case of other species laying dark eggs, where one or two white examples have been found among others of the normal color in the same nest-complement. But a single brood is positively known to be raised, although cases have come under our observation of nests with fresh eggs as late as the 15th of August—possibly the work of birds whose early efforts had been frustrated by enemies, or by some accident.
[Original Size]
Plate IV.—ICTERUS SPURIUS, Bonaparte.—Orchard Oriole.
The Orchard Oriole is quite abundant throughout most of the United States, from the Atlantic to the Missouri Valley, and on the southwest to the valley of the Rio Grande. Individuals have been met with by Mr. J. A. Allen as far west as the base of the Rocky Mountains, in Colorado, the extreme limit of its western range. It is probable that it breeds throughout the entire area of its distribution—sparingly, however, in New England, according to eminent authority; but quite freely in the Central States, from New York to South Carolina, and thence south-west to Texas.
The period of its arrival in the United States from the genial clime of Guatemala, where it winters, has been fixed by Mr. Dresser, who has carefully studied its nesting-habits in Texas, as early as the first or second week of April. But, farther north, its presence is not observed before the last week of April, or the beginning of May.
Unlike the Warblers and Thrushes, which prefer secluded localities, the subject of our sketch delights in cultivated grounds, particularly where the apple and the pear abound. Here it takes up its quarters, accomplishes the object of its mission, and thence retires to its distant winter-home. Occasionally, a few individuals are to be found in waste grounds, dense thickets, or along the borders of woods, but such cases are exceptional, and conditioned only by the close proximity of some time-honored orchard.
Mating does not occur until the 10th of May, more than two weeks after the advent of the sexes. But from the first, the male, who precedes his partner by some two or three days, may be heard in the early morning, and quite as frequently at the close of the day, from the tall tree-tops, chanting his wanton rhapsodies, for a half-hour at a time, utterly unmindful of passers-by. His roundelay, which is undoubtedly the free and happy expression of a heart actuated by the generous impulses of love, though composed of rather shrill and sprightly notes, and uttered with considerable agitation, is quite as pleasing as that of his nearest kin, the Baltimore Oriole. Clear, distinct and resonant, it thrills the air around, and is at last borne to the ears of some lonely female, tired with travel, and unblest by a partner. The life of the Orchard Oriole seems to be one of joyous song. Although, fond of a dainty tid-bit, in the form of a juicy worm, he is not given to gormandizing; he only eats from sheer necessity; for, after having satisfied the demands of Nature, he resumes his soul-stirring strains, to the delight of man and bird.