Call Duck
...that the high-pitched quack of the Call Duck was used to lure wild ducks into funnel traps?
...that the high-pitched quack of the <b id="mwB4M"><a class="mw-redirect" href="./Call_Duck" id="mwB4Q" rel="mw:WikiLink" title="Call Duck">Call Duck</a></b> was used to lure wild ducks into <a href="./Heligoland_trap" id="mwB4U" rel="mw:WikiLink" title="Heligoland trap">funnel traps</a>?