Tarictic Hornbill
...that the casque of the Tarictic Hornbill is hollow and made of keratin?
...that the casque of the <b id="mwAmQ"><a class="mw-redirect" href="./Tarictic_Hornbill" id="mwAmU" rel="mw:WikiLink" title="Tarictic Hornbill">Tarictic Hornbill</a></b> is hollow and made of <a href="./Keratin" id="mwAmY" rel="mw:WikiLink" title="Keratin">keratin</a>?