blue duiker
... that the blue duiker marks its territory by the secretions of glands near its eyes?
... that the <b id="mwA-s"><a href="./Blue_duiker" id="mwA-w" rel="mw:WikiLink" title="Blue duiker">blue duiker</a></b> marks its <a href="./Territory_(animal)" id="mwA-0" rel="mw:WikiLink" title="Territory (animal)">territory</a> by the secretions of <a href="./Gland" id="mwA-4" rel="mw:WikiLink" title="Gland">glands</a> near its eyes?