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The black-necked swan is the only member of its genus that breeds in the neotropics and is the largest waterfowl native to South America. Adults are 102 to 124 cm (40 to 49 in) long with a wingspan of 135 to 177 cm (53 to 70 in).
The black swan feeds in a similar manner to other swans. When feeding in shallow water it will dip its head and neck under the water and it is able to keep its head flat against the bottom while keeping its body horizontal. In deeper water the swan up-ends to reach lower. Black swans are also able to filter feed at the water's surface. [25]
The legs of most swans are typically a dark blackish-grey colour, except for the South American black-necked swan, which has pink legs. Bill colour varies: the four subarctic species have black bills with varying amounts of yellow, and all the others are patterned red and black.
Related: Mother Swan's Annual Tradition of Walking Through Woman's House Is Just So Touching. Raising Baby Swans. Baby swans or cygnets stay with their mother for about six months after hatching ...
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Coscoroba swan: Coscoroba coscoroba (Molina, 1782) 28 Black swan: Cygnus atratus (Latham, 1790) 29 Black-necked swan: Cygnus melancoryphus (Molina, 1782) 30 Mute swan: Cygnus olor (Gmelin, JF, 1789) 31 Trumpeter swan: Cygnus buccinator Richardson, 1831: 32 Tundra swan: Cygnus columbianus (Ord, 1815) 33 Whooper swan: Cygnus cygnus (Linnaeus ...
Despite its Eurasian origin, its closest relatives are the black swan of Australia and the black-necked swan of South America, not the other Northern Hemisphere swans of the genus Cygnus. [2] The species is monotypic, with no living subspecies. [2] [4]
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