I would think that it has something to do with what they eat.
They have webbed feet and a long curved neck
Not by a long shot
A swan's neck is proportional to its body. There are three different types of swan which is the Trumpeter Swan, Mute Swan and Tundra Swan.
beak,eyes,neck,wings,webbed feet.
Brown swans or a white with a black neck and head is white
No bird has fur, birds have feathers.
a tight green u-neck
If they have a LONG neck, they're swans.
Make it as SKINNY as you can and elegant. not tooooo skinny though. wear a simple necklace and hold your neck up nice and tall. SLIGHTLY push your head forward and away from it and make it look andtall as possible..
DERTURKEN
Yes, check out this picture of a Swan neck skeleton, you can see them: http://upload.wikimedia.org/wikipedia/commons/1/1aSwan_neck_skeleton.jpg
There are 24-25 vertebrate in a adult swan's neck, much more than the human or even giraffe .