The Mute Swan Is A Very Large White Waterbird. It Has A Long S-Shaped Neck And An Orange Bill With A Black Base And A Black Knob. Swans Are Birds Of The Family Anatidae Within The Genus Cygnus. The Swans' Closest Relatives Include The Geese And Ducks. Swans Are Grouped With The Closely Related Geese In The Subfamily Anserinae Where They Form The Tribe Cygnini. Sometimes, They Are Considered A Distinct Subfamily,

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