Palaeochiropteryx
... that the many examples of extinct 48-million year old bat genus Palaeochiropteryx found in the Messel lake may have drowned after being rendered unconscious in flight by poisonous volcanic gases?
... that the many examples of <a class="mw-redirect" href="./Extinct" id="mwBEY" rel="mw:WikiLink" title="Extinct">extinct</a> 48-million year old <a href="./Bat" id="mwBEc" rel="mw:WikiLink" title="Bat">bat</a> <a href="./Genus" id="mwBEg" rel="mw:WikiLink" title="Genus">genus</a> <i id="mwBEk"><b id="mwBEo"><a href="./Palaeochiropteryx" id="mwBEs" rel="mw:WikiLink" title="Palaeochiropteryx">Palaeochiropteryx</a></b></i> <i id="mwBEw">(life restoration pictured)</i> found in the <a class="mw-redirect" href="./Messel_Pit" id="mwBE0" rel="mw:WikiLink" title="Messel Pit">Messel lake</a> may have drowned after being rendered unconscious in flight by poisonous <a href="./Volcanic_gas" id="mwBE4" rel="mw:WikiLink" title="Volcanic gas">volcanic gases</a>?