n.雷鸟（松鸡类，是寒带地区特有的鸟类）
A black fox came toward him, carrying a ptarmigan in his mouth. 又有一只黑毛狐狸朝他走来,嘴里衔着一只雷鸟。
I was hiking around Guanella Pass in Colorado to photograph white-tailed ptarmigan. 我正在科罗拉多瓜内拉山口徒步旅行，拍摄白尾松鸡。
