Japanese pygmy woodpecker
... that the Japanese pygmy woodpecker becomes smaller and darker from the north of its range to the south?
... that the <b id="mwAtc"><a href="./Japanese_pygmy_woodpecker" id="mwAtg" rel="mw:WikiLink" title="Japanese pygmy woodpecker">Japanese pygmy woodpecker</a></b> becomes smaller and darker from the north of its range to the south?