Islands are known to differ in the food supply available to ground finches, mainly seeds.
More Quotes from Peter R. Grant:
The process of speciation is completed with the cessation of genetic exchange.Peter R. Grant
Species can be recognized by their morphological characteristics and songs.
Peter R. Grant
Exchange of breeding individuals between two populations tends to homogenize their gene pools.
Peter R. Grant
Males transmit signals in courtship through behavioral displays.
Peter R. Grant
The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology is disrupted.
Peter R. Grant
Closely related species of birds are also chromosomally similar.
Peter R. Grant
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