The Mute Swan, a massive bird that evokes great elegance and beauty. These birds are fascinating for so many reasons, one of the most common being that they mate for life. Mute Swans unlike other swans are known for their orange beaks and more quiet lifestyle. However, despite their elegance and silence they are still extremely territorial birds that can grow to be 5 feet long and 25 pounds. Might be a beauty to view from a distance. In Oregon, this aggressive attitude and extreme appetite has led them to become an invasive species.