Silvery-cheeked Hornbill, <i>Ceratogymna brevis</i>  Syn. <i><a href="//commons.wikimedia.org/wiki/Bycanistes_brevis" title="Bycanistes brevis">Bycanistes brevis</a></i>, offset reproduction of watercolor
<bdi><a href="https://en.wikipedia.org/wiki/en:Louis_Agassiz_Fuertes" class="extiw" title="w:en:Louis Agassiz Fuertes"><span title="United States ornithological artist (1874-1927)">Louis Agassiz Fuertes</span></a>
</bdi>
1930
<i>Album of Abyssinian Birds and Mammals from Paintings by Louis Agassiz Fuertes</i> (Chicago: Field Museum of Nautral History)