Rhithrogena germanica
... that the mayfly Rhithrogena germanica can emerge from a river, moult and fly off in 30 seconds?
... that the <a href="./Mayfly" id="mwCtE" rel="mw:WikiLink" title="Mayfly">mayfly</a> <i id="mwCtI"><b id="mwCtM"><a href="./Rhithrogena_germanica" id="mwCtQ" rel="mw:WikiLink" title="Rhithrogena germanica">Rhithrogena germanica</a></b></i> <i id="mwCtU">(pictured)</i> can emerge from a river, <a href="./Ecdysis" id="mwCtY" rel="mw:WikiLink" title="Ecdysis">moult</a> and fly off in 30 seconds?