A mangrove finch, the rarest of Darwin's finches.
Michael Dvorak
CC BY 2.5
<p>Brumm H, Farrington H, Petren K, Fessl B (2010) Evolutionary Dead End in the Galápagos: Divergence of Sexual Signals in the Rarest of Darwin's Finches. PLoS ONE 5(6): e11191. <a rel="nofollow" class="external free" href="https://doi.org/10.1371/journal.pone.0011191">https://doi.org/10.1371/journal.pone.0011191</a>
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Figure 1 <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371%2Fjournal.pone.0011191.g001">10.1371/journal.pone.0011191.g001</a>