Bird Song and Parallel Evolution: learning from our feathered friends
10,000 Birds
APRIL 21, 2011
The modal bird song is a song, but not all ‘songs’ are song-like, in the sense that we expect song to come out of the ‘mouth’ (bill) and to consist of modulated air currents (like human voice). Drawing of bower birds from Darwin’s 1871 volume on sexual selection. The top two are individuals with normal song.
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