Morphological shifts in island-dwelling birds: the roles of generalist foraging and niche expansion.

@article{Scott2003MorphologicalSI,
  title={Morphological shifts in island-dwelling birds: the roles of generalist foraging and niche expansion.},
  author={Susan N Scott and Sonya M Clegg and Simon P. Blomberg and Jiro Kikkawa and Ian P. F. Owens},
  journal={Evolution; international journal of organic evolution},
  year={2003},
  volume={57 9},
  pages={2147-56}
}
Passerine birds living on islands are usually larger than their mainland counterparts, in terms of both body size and bill size. One explanation for this island rule is that shifts in morphology are an adaptation to facilitate ecological niche expansion. In insular passerines, for instance, increased bill size may facilitate generalist foraging because it allows access to a broader range of feeding niches. Here we use morphologically and ecologically divergent races of white-eyes (Zosteropidae… CONTINUE READING
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