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Birdsong is an important sexually selected trait, and its acoustic features are socially transmitted in the process of song learning. The preference of some female songbirds for song complexity as measured by repertoire size has driven the evolution of many song traits and song-learning programs in males. If juvenile birds adopt the attractiveness of model birds by copying their repertoires, tutor...
Birdsong may be perceived and processed differently by males and females because the production and function of this behaviour are often sexually dimorphic. However, examination of this hypothesis has been difficult, since different behavioural measures have been used to describe the perceptual process for each sex. We analysed changes in heart rate as an index of song perception in Bengalese finches,...
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