Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 543
tigated the Baltimoreorioles. When left without training, they sing asong of their own. Two birds isolated from theirown kind and from all other birds, but with astrong inherited tendency to sing, originated anovel method of song. Four birds, isolated fromwild representatives of their own kind and… … GRASSHOPPER-SPARROW AND THE GRASSHOPPERSWHICH HE MIMICS. the notes of the parent birds affect the young ofseveral species even before they are hatched. When the little prisoner is hammering at itsshell, and uttering its feeble peep, as if beggingto be let out, if the warning note is uttered, even…
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