Mr. Audubon speaks of the nest as built in places similar to those chosen by the other species, as formed of the same materials, and arranged with quite as little art. He gives the number of eggs as from four to six, of a greenish-blue, nearly equal at both ends, but rather smaller than those of the Yellow-bill, rounder, and of a much deeper tint of green. He gives their measurement as 1.50 inches in length and .87 of an inch in breadth.
Mr. Nuttall, whose description more nearly corresponds with my own observations, speaks of this species as usually retiring into the woods to breed, being less familiar than the former species, and choosing an evergreen bush or sapling for the site of the nest, which is made of twigs pretty well put together, but still little more than a concave flooring, and lined with moss occasionally, and withered catkins of the hickory. The eggs are described as smaller, and three to five in number, of a bluish-green. The female sits very close on the nest, admitting a near approach before flying. He also speaks of this species as being less timorous than the Yellow-billed, and states that near the nest, with young, he has observed the parent composedly sit and plume itself for a considerable time without showing any alarm at his presence.
In all the instances in which I have observed the nest of this species, I have invariably found it in retired damp places, usually near the edges of woods, and built, not in trees, after the manner of the Yellow-billed Cuckoo, but in bushes and in low shrubbery, often not more than two or three feet from the ground. The nest, without being at all remarkable for its finish, or the nicety of its arrangement, is much more artistic and elaborate than
that of the Yellow-bill. It is composed of twigs, roots, fine strips of bark, and moss, and is sometimes interwoven and partially lined with the soft catkins of trees and blossoms of plants. The eggs vary from three to six in number, and are often found to have been deposited, and incubation commenced on them, at irregular intervals, and to be in various stages of development in the same nest. I have hardly been able to observe a sufficient number of their nests to be able to state whether this species carries this irregularity so far as the Yellow-bill, nor am I aware that it has ever been known to extend its incubations into so late a period of the season. It is, if anything, more devoted to its offspring than the Yellow-bill. Both parents are assiduous in the duties of incubation, and in supplying food to each other and to their offspring. In one instance, where the female had been shot by a thoughtless boy, as she flew from the nest, the male bird successfully devoted himself to the solitary duty of rearing the brood of five. At the time of the death of the female the nest contained two eggs and three young birds. The writer was present when the bird was shot, and was unable to interpose in season to prevent it. Returning to the spot not long afterwards, he found the widowed male sitting upon the nest, and so unwilling to leave it as almost to permit himself to be captured by the hand. His fidelity and his entreaties were not disregarded. His nest, eggs, and young, were left undisturbed; and, as they were visited from time to time, the young nestlings were found to thrive under his vigilant care. The eggs were hatched out, and in time the whole five were reared in safety. This single incident shows how wide is the interval between these Cuckoos and their European namesakes.
The egg resembles that of the other, but is more spherical and of a much darker shade of green. The color is equally fugitive, and even in a closed cabinet fades so that the eggs of the two species are undistinguishable, except in size and shape. This egg averages 1.10 inches in length by .90 of an inch in breadth.
Genus CROTOPHAGA, Linnæus.
Crotophaga, Linnæus, Systema Naturæ, 1756. (Type, C. ani, Linn.).
Gen. Char. Bill as long as the head, very much compressed; the culmen elevated into a high crest, extending above the level of the forehead. Nostrils exposed, elongated. Point of bill much decurved. Wings lengthened, extending beyond the base of the tail, the fourth or fifth quill longest. Tail lengthened, of eight graduated feathers. Toes long, with well-developed claws.
The feathers in this genus are entirely black; those on the head and neck with a peculiar stiffened metallic or scale-like border. The species are not numerous, and are entirely confined to America.
