Approximate distribution map of Mute Swan. Green: year-round, yellow: breeding, blue: wintering. Adapted from: Ducks, geese, and swans /  edited by Janet Kear, Oxford ; New York : Oxford University Press, 2005. 2 v. (xxi, 908 p.) : ill., maps; 26 cm. (ISBN 0198546459)
Own work
Cephas