- The death of the dinosaurs
恐龙的灭绝 - had left many of Earth's great habitats free for the taking.
使地球上许多重要的栖息地 变得唾手可得 - None more so than the plains.
平原尤其如此 - And in early South America, 46 million years after the asteroid,
在早期的南美 小行星撞击的4600万年后 - ground-dwelling birds had the space
居住在地上的鸟类有了空间 - to evolve into the deadliest predator since Tyrannosaurus rex.
进化成了 自霸王龙以来最致命的捕食者 - Stalking among the glades of palms...
它们在棕榈林地中潜伏