<i>Cygnus melanocoryphus</i>
Length: 102-140 in.
<p>
The Black-necked Swan is an import from South America.
Both sexes are similar in plumage, but the female is a little smaller in size
and the knob on the head is also a little smaller.
The Black-necked Swan is the smallest in its genus and is found in freshwater
marshes, lagoons and lakes.
</p>