. Vida de las aves de Michigan : una lista de todas las especies de aves conocidas que ocurren en el Estado junto con un esquema de su clasificación y un relato de la historia de vida de cada especie, con especial referencia a su relación con la agricultura... . toleave el nido. Es mucho más común, sin embargo, encontrar un par de warblersor vireos que alimentan a un solo ave vaquera joven. Se afirma que los Cowbirdis tienen cuidado de seleccionar un nido que ya contiene huevos, pero esto ciertamente no es cierto en Michigan, ya que decenas de nidos abandonados se encuentran cada año con-. Placa XLIV. Cowbird. Mai.-.Reimpreso de Chapmans Bi

• Colaborador/a: Reading Room 2020 / Alamy Foto de stock
• ID de la imagen: 2CNRC00
• Tamaño: 7,2 MB (336,4 KB Descarga comprimida)
• Autorizaciones: Modelo - no | Propiedad - no
• Dimensiones: 1677 x 1491 px | 28,4 x 25,2 cm | 11,2 x 9,9 inches | 150dpi

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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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