Crested Shelduck
...that the Crested Shelduck is a critically endangered duck that has not been definitively seen since 1964, despite a handful of possible sightings and numerous surveys of its presumed habitat?
...that the <b id="mwF6Y"><a class="mw-redirect" href="./Crested_Shelduck" id="mwF6c" rel="mw:WikiLink" title="Crested Shelduck">Crested Shelduck</a></b> <i id="mwF6g">(pictured)</i> is a <a class="mw-redirect" href="./Critically_endangered_species" id="mwF6k" rel="mw:WikiLink" title="Critically endangered species">critically endangered</a> <a href="./Anatidae" id="mwF6o" rel="mw:WikiLink" title="Anatidae">duck</a> that has not been definitively seen since 1964, despite a handful of possible sightings and numerous surveys of its presumed habitat?