Imperial Woodpecker (<i><a href="//commons.wikimedia.org/wiki/Campephilus_imperialis" title="Campephilus imperialis">Campephilus imperialis</a></i>), male (below), female (above), chromolithograph
<bdi><a href="https://en.wikipedia.org/wiki/en:John_L._Ridgway" class="extiw" title="w:en:John L. Ridgway"><span title="American ornithologist">John L. Ridgway</span></a>
</bdi>
1898
<i>The Auk</i>