Lack of premating isolation at the base of a phylogenetic tree.

@article{Grant2002LackOP,
  title={Lack of premating isolation at the base of a phylogenetic tree.},
  author={Barbara Rosemary Grant and Peter R Grant},
  journal={The American naturalist},
  year={2002},
  volume={160 1},
  pages={1-19}
}
Darwin's finches in the Galápagos archipelago are an unusual example of adaptive radiation in that the basal split separates two lineages of warbler finches (Certhidea olivacea and Certhidea fusca) believed until recently to be only one species. The large genetic difference between them contrasts with their similarity in plumage, size, shape, and courtship behavior. They differ in song, which is a key factor in premating isolation of other sympatric Darwin's finches. We conducted playback… CONTINUE READING