Guadalupe Junco <i>Junco insularis</i>, male; Guadalupe Island, Mexico
Pau Aleixandre, Julio Hernández Montoya, Borja Milá
CC BY 2.0
<a rel="nofollow" class="external text" href="http://www.plosone.org/article/fetchObject.action?uri=info%3Adoi%2F10.1371%2Fjournal.pone.0063242&amp;representation=PDF">PLoS ONE 8(5): e6324</a>: figure 2E