Common Cactus-finch; head from lateral, bill from dorsal, remiges tips from ventral
Unknown author<span style="display: none;">Unknown author</span>
1870
<i>Proceedings of the Zoological Society of London</i> (<a rel="nofollow" class="external text" href="https://archive.org/details/proceedingsofgen70zool">vol. 1870</a>, <a rel="nofollow" class="external text" href="https://archive.org/stream/proceedingsofgen70zool#page/326/mode/1up">page 326</a>)