The eggs are of an oval shape, pointed at one extremity, and measure .09 of an inch in length, and .49 in width. The ground-color is white, and over it are scattered spots of lilac and purple, as well as others of two shades of umber-brown. In all the specimens which we have examined from New England and Northern Georgia the spots are mostly accumulated about the larger half of the egg, those upon the smaller portion being finer and less numerous.
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Plate XIX.—ZENAIDURA CAROLINENSIS, (Linn.) Bonaparte.—Mourning Dove.
The Mourning Dove, one of the best known of our American species, is quite generally diffused throughout the United States. It is found from the Gulf of Mexico to Colorado, and from the Atlantic westward to the Pacific Ocean. In the Northern States it is chiefly migratory; in the Middle Atlantic but partially so; while in the country south of Pennsylvania it is a winter resident, and manifests a tendency to gregariousness, flocks of hundreds, and even more, being seen during the winter in the woods of South Carolina and Georgia.
East of the Rocky Mountains, as well as in the vast region stretching westward, they occur in greater or less abundance. To be sure there are localities where they are notably scarce, but only in regions unblessed by Nature with suitable accommodations for nesting purposes, and with the essential means of subsistence.
In the South, breeding occasionally takes place early in March, but ordinarily not before the beginning of April. Not so in more northern sections. The eighth of March, which is also the time of their appearance in the Middle States, marks the period of their arrival in New England, although in Eastern Pennsylvania, during very backward seasons, their visit is often delayed until the fifteenth of April. But, in the extreme northern parts of our country, various circumstances combine to render their coming an event of later occurrence, for we find that they do not reach the States of Michigan and Wisconsin much before the twentieth of the month. The vicissitudes incident to change of climate and new environments all operate to prevent the assumption of matrimonial relations as early as in semi-tropical climes.
Upon arrival, they seem to abandon their gregarious habits, and appear only in pairs, seldom more than a half-dozen paired individuals being found in any square mile of territory. During the short period which elapses before building operations are begun, which lasts from three to four weeks, they occupy the time in feeding, in dusting themselves by the roadside, or in the enjoyment of each other's society.