“We observe closely related species in sympatry and infer how they evolved from a common ancestor.”
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The process of speciation is completed with the cessation of genetic exchange.
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We observe closely related species in sympatry and infer how they evolved from a common ancestor.
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Species can be recognized by their morphological characteristics and songs.
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To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life.
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Thus mating of females was strictly along the lines of paternal song.
Peter R. Grant
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