So true I did and I didn't know it. His plumage looks like a puzzle. I had no idea there were so many variations of bird in the web kingdom. I envy the people that made a career of studying these birds. The beauty is infinite. I never knew treaties existed regarding the welfare of them but it's obviously a good thing. It is totally domestic birds' fault for being so cute and spoiled. I am glad so many people have and love them so much.Isn't that crazy? The Family contains ducks, geese and swans but within the family they are all over the place more like an impressionist painting than a structured tree. Mr. Shelduck sure is pretty too! You made a little puzzle out of him by calling him a shell duck. I think our domestic ducks are somewhat limited because most of these birbs fall under international migratory waterfowl treaties so the wild stay wild and the Mallard based ducks are what the Europeans had already domesticated. All these other ducks were probably just hunted by their local humans around the world without domesticating them prior to the treaties so they never got to be a spoiled rotten pet.