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Peter R. Grant has 17 quotes on this site. A few more worth reading:

• Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are…
• We observe closely related species in sympatry and infer how they evolved from a common ancestor.
• Species can be recognized by their morphological characteristics and songs.
• Thus mating of females was strictly along the lines of paternal song.
• The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology…
• To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically…
• Genes that underlie the capacity to receive, use and transmit information are the evolving properties.
• Exchange of breeding individuals between two populations tends to homogenize their gene pools.
• The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes…
• Islands are known to differ in the food supply available to ground finches, mainly seeds.
• Plumage features constitute a major component of courtship signals.
• Evidence of epistasis from hybridization studies is more scarce.

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