Rufous-crowned Sparrow
...that the Rufous-crowned Sparrow, a medium-sized sparrow of the southwestern United States and Mexico, has a subspecies endemic to the Todos Santos Islands that has not been seen since the 1970s?
...that the <b id="mwByg"><a class="mw-redirect" href="./Rufous-crowned_Sparrow" id="mwByk" rel="mw:WikiLink" title="Rufous-crowned Sparrow">Rufous-crowned Sparrow</a></b>, a medium-sized <a class="mw-redirect" href="./American_sparrow" id="mwByo" rel="mw:WikiLink" title="American sparrow">sparrow</a> of the southwestern <a href="./United_States" id="mwBys" rel="mw:WikiLink" title="United States">United States</a> and <a href="./Mexico" id="mwByw" rel="mw:WikiLink" title="Mexico">Mexico</a>, has a <a href="./Subspecies" id="mwBy0" rel="mw:WikiLink" title="Subspecies">subspecies</a> <a href="./Endemism" id="mwBy4" rel="mw:WikiLink" title="Endemism">endemic</a> to the <a class="mw-redirect" href="./Todos_Santos_Islands" id="mwBy8" rel="mw:WikiLink" title="Todos Santos Islands">Todos Santos Islands</a> that has not been seen since the 1970s?