North Island Robin
...that New Zealand's North Island Robin was originally thought to be a subspecies of the New Zealand Robin, but mitochondrial DNA sequence analysis has shown that the two lineages split prior to the Pleistocene?
...that <a href="./New_Zealand" id="mwES4" rel="mw:WikiLink" title="New Zealand">New Zealand</a>'s <b id="mwES8"><a class="mw-redirect" href="./North_Island_Robin" id="mwETA" rel="mw:WikiLink" title="North Island Robin">North Island Robin</a></b> was originally thought to be a <a href="./Subspecies" id="mwETE" rel="mw:WikiLink" title="Subspecies">subspecies</a> of the <a class="mw-redirect mw-disambig" href="./New_Zealand_Robin" id="mwETI" rel="mw:WikiLink" title="New Zealand Robin">New Zealand Robin</a>, but <a href="./Mitochondrial_DNA" id="mwETM" rel="mw:WikiLink" title="Mitochondrial DNA">mitochondrial DNA</a> <a href="./DNA_sequencing" id="mwETQ" rel="mw:WikiLink" title="DNA sequencing">sequence</a> analysis has shown that the two <a class="mw-disambig" href="./Lineage" id="mwETU" rel="mw:WikiLink" title="Lineage">lineages</a> split prior to the <a href="./Pleistocene" id="mwETY" rel="mw:WikiLink" title="Pleistocene">Pleistocene</a>?