Swan
Swan, wistling swan largest waterfowl species of the subfamily Anserinae, family Anitidae (order Anseriformes). Most swans are classified in the genus Cygnus.
 Swans are gracefully long-necked, heavy-bodied, big-footed birds that 
glide majestically when swimming and fly with slow wingbeats and with 
necks outstretched. They migrate in diagonal formation or V-formation at
 great heights, and no other waterfowl moves as fast on the water or in 
the air.
 
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