- is that competition drives adaptation.
竞争推动适应 - And the most acute competition comes from one's own kind.
最激烈的竞争来自同类 - A male terror bird.
一只雄性骇鸟 - His territory is the lakeshore.
湖岸是它的领地 - But he's not alone.
但它并不孤单 - A younger male wants this prime spot.
一只年轻的雄性也想要这个绝佳位置 - The older one can't ignore the threat.
年长的骇鸟不能无视威胁