Encara no tenim significats per a "rock ptarmigan".
1He came upon a valley where rock ptarmigan rose on whirring wings from the ledges and muskegs.
2In the course of the day Hubbard shot three rock ptarmigans-"rockers, "Georgecalled them.
3Except for the willow and rock ptarmigans the land game-birds are not many in kind or numbers.