noun
mountain goat; Rocky Mountain goat
Refers specifically to Oreamnos americanus, the North American mountain goat.
シロイワヤギは北アメリカの高山に生息している。
Mountain goats inhabit the high mountains of North America.
動物園でシロイワヤギの親子を見た。
I saw a mountain goat and its kid at the zoo.
Compound of 白 (shiro, 'white') + 岩 (iwa, 'rock') + 山羊 (yagi, 'goat'), describing the animal's appearance and habitat. The exact derivation is uncertain, but the name is a straightforward descriptive coinage.