Degrange: The skull of that animal correspond to the largest bird skull known—71 centimeters long.

德格朗日：该动物的头骨相当于已知最大的鸟类头骨——长 71 厘米。

Degrange: They used the beak as an ax to kill prey.

Degrange：他们用喙作为斧头杀死猎物。

Degrange: The largest ones were the top predators in South America, together with the marsupials and terrestrial crocodiles.

Degrange：最大的是南美洲的顶级掠食者，还有有袋动物和陆生鳄鱼。

Degrange: They are almost all from Argentina, but there are some localities in Uruguay and Brazil, and Texas and Florida in the States.

Degrange：他们几乎都来自阿根廷，但在乌拉圭和巴西，以及美国的得克萨斯州和佛罗里达州也有一些地方。

Degrange: There were other ungulates that were around, like small horses, that perfectly fit in the prey for a large terror bird.

Degrange：周围还有其他有蹄类动物，比如小马，非常适合大型恐怖鸟的猎物。

Degrange: No other birds, extant or fossil, in the whole history of birds, occupy the niche of this hyper-predator—only the terror birds.

德格朗日：在鸟类的整个历史中，没有其他鸟类，无论是现存的还是化石的，都占据了这种超级捕食者的位置——只有恐鸟。

Degrange: And imagine that during your running, that animal will be next to you and will start to hitting you with their beak like an ax.

Degrange：想象一下，在你奔跑的过程中，那只动物会在你身边，并开始用它们的喙像斧头一样攻击你。

Degrange: That's why they are " terror birds." Lichtman: So picture a 400-pound bird running at you at 25 miles per hour—because, by the way, they were fast too.

Degrange：这就是为什么它们是“恐怖鸟”。 Lichtman：想象一下一只 400 磅重的鸟以每小时 25 英里的速度向你奔来——因为，顺便说一句，它们也很快。