<b><a href="https://en.wikipedia.org/wiki/Knobbed_Hornbill" class="extiw" title="en:Knobbed Hornbill">Sulawesi Wrinkled Hornbill (Knobbed Hornbill)</a></b> (male) (Aceros cassidix) at <a href="https://en.wikipedia.org/wiki/Weltvogelpark_Walsrode" class="extiw" title="en:Weltvogelpark Walsrode">Weltvogelpark Walsrode</a> (Walsrode Bird Park, Germany)
<a href="//commons.wikimedia.org/wiki/User:Fiorellino" title="User:Fiorellino">Olaf Oliviero Riemer</a>
<span class="int-own-work" lang="en">Own work</span>