large frogmouth
... that the nest of the large frogmouth consists of a circular cushion of down on which a single egg is balanced?
... that the nest of the <b id="mwBC8"><a href="./Large_frogmouth" id="mwBDA" rel="mw:WikiLink" title="Large frogmouth">large frogmouth</a></b> consists of a circular cushion of down on which a single egg is balanced?