The black footed-ferret historically ranged all across the Great Plains of North America, from Canada to Mexico.

黑足雪貂的足迹曾经遍布整个北美大平原，从加拿大一直到墨西哥。

These creatures can be found roaming  the great plains of North America into northern Mexico.

这些生物可以在北美大平原漫游到墨西哥北部。

Though  they were once abundant across the Great Plains of North America, sage grouse  populatioarens are rapdily declining.

尽管它们曾经在北美大平原上大量存在，但鼠尾草种群正在迅速减少。