THE SONG OF THE CHINGOLO, ZOiVOTRICHlA CAPENSIS, IN ARGENTINA: DESCRIPTION AND EVALUATION OF A SYSTEM OF DIALECTS

Any intelligent statement about the role of dialects in bird song presupposes a knowledge of the functions of song. It has been suggested that song may subserve territorial advertisement, attracting unmated females and repelling other males. Less speculation has attended the possibility that song may stimulate the female to undergo hormonal changes leading towards ovulation or that it may affect other aspects of the integration of breeding behavior.