Annual duck fashion show... (why have no one told me that this is a thing?)

Not quite, they're domestic ducks that are raised for meat, eggs and down.
Many ducks are also kept for show, as pets, or for their ornamental value.
Almost all varieties of domestic duck apart from the Muscovy duck (Cairina moschata) are descended from the mallard (Anas platyrhynchos)

I legit had to look this up. I never knew there were ducks with necks that long