Volume 30 Issue 4
Jul.  2009
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Rebekah Christensen, Sonia Kleindorfer. Bill Morphology Does Not Influence Vocal Performance in Darwin’s Small Tree Finch on Floreana Island. Zoological Research, 2009, 30(4): 423-428. doi: 10.3724/SP.J.1141.2009.04423
Citation: Rebekah Christensen, Sonia Kleindorfer. Bill Morphology Does Not Influence Vocal Performance in Darwin’s Small Tree Finch on Floreana Island. Zoological Research, 2009, 30(4): 423-428. doi: 10.3724/SP.J.1141.2009.04423

Bill Morphology Does Not Influence Vocal Performance in Darwin’s Small Tree Finch on Floreana Island

doi: 10.3724/SP.J.1141.2009.04423
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  • Corresponding author: Sonia Kleindorfer
  • Received Date: 2009-02-23
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2009-08-22
  • Bird song is used for mate attraction and is important for establishing reproductive isolation. Current research highlights performance constraints on song production that may be influenced by variation in bill morphology. Darwin’s finches are a model system for studying the relationship between morphology and song performance, with previous studies suggesting that lower vocal performance is correlated with larger bill size. Here, we tested for a relationship between bill morphology and vocal performance in Darwin’s Small Tree Finch (Camarhynchus parvulus) on Floreana Island. We found no evidence of a correlation between bill morphology and vocal performance. This finding is in agreement with prior study of the Small Tree Finch, but contrasts a greater body of work addressing song in Darwin’s Finches. We discussed our findings in the context of ecological divergence, and ecological variation across species.
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