Significantly, this herd will be entirely free of cattle genes-unlike most existing buffalo herds in America, which have interbred with domestic cattle.

更为重要的是，这个群体将完全是纯种野生基因，而非像美国现存的许多野牛群，是与驯养的家牛杂交的后代。

But the Grand Canyon birds have found new opportunities cleaning up the remains of other large animals, like elk, mule deer, bighorn sheep, and even domestic cattle.

但大峡谷的鸟类找到了清理其他大型动物遗骸的新机会，如麋鹿、长耳鹿、大角羊，甚至家牛。