moustached hawk-cuckoo
... that both the adult and fledgling of the moustached hawk-cuckoo have a moustache?
... that both the adult and <a href="./Fledge" id="mwBLY" rel="mw:WikiLink" title="Fledge">fledgling</a> of the <b id="mwBLc"><a href="./Moustached_hawk-cuckoo" id="mwBLg" rel="mw:WikiLink" title="Moustached hawk-cuckoo">moustached hawk-cuckoo</a></b> have a moustache?