A Comparative Study of "advertising Song" in the Hylocichla Thrushes1956 - Birdsongs - 11 pages |
Common terms and phrases
advertising song alternated analyses appear AUDIOSPECTROGRAPHS OF SONGS average frequency beginning breeding characteristic closely comparison complex arrangement composed contains contrast decrease derived different phrases distinct dividual Elk Lake endings equipment essentially extreme Figure five species FREQUENCY IN KILOCYCLES frequency increase frequency range Gray-cheeked Thrush Hermit Thrush higher homologous HYLOCICHLA THRUSHES illustrated in Plate indicated individual bird individual patterns interval introductory notes Ithaca July June 17 June 29 less lower Lowest Maryland meas measurement method middle section Mount Mansfield number of individual observed Olive-backed Thrush Plate 22 Quebec range recent regularly repeated second section SECONDS 1.5 series of introductory series of phrases series of short short notes similar phrases simultaneously sound pattern species of Hylocichla spectro spectrograms Stillwell studied successive suggested sustained notes terminal section Thrush Hylocichla usually uttered variations varied Veery vocal weak Wood Thrush Wood Thrush pattern Wood Thrush song York