Ephemera simulans
... that the nymphs of the mayfly Ephemera simulans are able to burrow?
... that the <a href="./Nymph_(biology)" id="mwBHk" rel="mw:WikiLink" title="Nymph (biology)">nymphs</a> of the mayfly <i id="mwBHo"><b id="mwBHs"><a href="./Ephemera_simulans" id="mwBHw" rel="mw:WikiLink" title="Ephemera simulans">Ephemera simulans</a></b></i> are able to burrow?