. Michigan bird life : un elenco di tutte le specie di uccelli conosciute per verificarsi nello Stato insieme con un profilo della loro classificazione e un resoconto della storia della vita di ogni specie, con particolare riferimento al suo rapporto con l'agricoltura ... . ^ toleave il nido. È molto più comune, tuttavia, trovare un paio di vireos warblersor che alimentano un singolo giovane Cowbird. Si sostiene che il Cowbirdis attento a selezionare un nido già contenente uova, ma questo certamente è nottrue in Michigan, poiché i punteggi di nidi deserti sono trovati ogni anno con-. Piastra XLIV. Cowbird. Mai.-.ristampato da 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

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• bookidmichiganbird
• bookyear1912