疣鼻天鵝 / Mute Swan

疣鼻天鵝全長約150公分。黃嘴天鵝和小天鵝是飛來過冬的侯鳥，但疣鼻天鵝幾乎一整年都定居在固定的地方。在北海道距離新千歲機場開車約30分鐘的UTONAI湖可常常見到疣鼻天鵝。也有疣鼻天鵝的群落定居在洞爺湖。嘴巴是黑色和橘色，上半部的根部有黑色疣般的突起物。

The Mute Swan is approximately 1.5 meters from beak to tail. Lake Utonai, which is in Tomakomai City, about 30 minutes by car from New Chitose Airport, accommodates the largest colony of the Mute Swan in Hokkaido. There is also a smaller colony at Lake Toya. Compared to the Whooper Swan and Tundra Swan which migrate to Hokkaido in winter, the Mute Swan is a year round inhabitant. It is rumored that they escaped from zoological parks many years ago. Originally, this species was not seen in Japan, depending on what you read. Their beaks are black and orange, with a pronounced knob atop the beak.