. Vie des oiseaux du Michigan : une liste de toutes les espèces d'oiseaux connues pour se produire dans l'État avec un aperçu de leur classification et un compte rendu de l'histoire de la vie de chaque espèce, avec une référence spéciale à sa relation à l'agriculture ... . ^ toleave le nid. Il est beaucoup plus commun, cependant, de trouver une paire de vireos de woblersor nourrissant un seul jeune Cowbird. Il est affirmé que le Cowbirdis prudent de choisir un nid déjà contenant des oeufs, mais cela n'est certainement pas vrai au Michigan, puisque des dizaines de nids désertés sont trouvés chaque année con-. Plaque XLIV. Cowbird. Mai.-.Reimprimé de Chapmans Bi

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. Michigan bird life : a list of all the bird species known to occur in the State together with an outline of their classification and an account of the life history of each species, with special reference to its relation to agriculture ... . ^ toleave the nest. It is much more common, however, to find a pair of warblersor vireos feeding a single young Cowbird. It is claimed that the Cowbirdis careful to select a nest already containing eggs, but this certainly is nottrue in Michigan, since scores of deserted nests are found each year con-. Plate XLIV. Cowbird. Mai.-.Reprinted from Chapmans Bird Life. By courtesy of D. Appleton & Co. LAND BIRDS. 437 taining single eggs of the Cowbird. It is also common to find a nest con-taining two, three, or even four Cowbirds eggs along with one or moreeggs of the rightful owner. Ordinarily such nests are promptly deserted. The species most commonly imposed upon are the various warblers, flycatchers, vireos and sparrows which nest in exposed situations wherethe Cowbird can readily find them. Nevertheless, a very large numberof small birds suffer from the visits of the Cowbird, and a few species whichnest in the deep woods are frequently victimized, among them the Ovenbird.Captain Bendire gives a list of ninety-one species and subspecies in whosenests Cowbirds eggs have been found, and states that undoubtedly a numberof others yet remain to be added to the list. In a few cases a bird thusimposed upon builds a false bottom or shelf above the eggs of the intruderand also raises the ri

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