noun
eastern greylag goose
Refers specifically to the eastern subspecies of the greylag goose (Anser anser), a large waterfowl. Used in ornithological contexts.
灰色雁はヨーロッパからアジアにかけて見られる大型の水鳥です。
The eastern greylag goose is a large waterfowl found from Europe to Asia.
Compound of 灰色 (はいいろ, 'gray') + 雁 (がん, 'wild goose'), describing the bird's grayish plumage.