Season the duck lightly with salt and pepper, place in a baking pan on a rack and roast in a preheated 375¦F oven for 1 hour, until juices run clear and meat is tender. Let cool. Pull off the meat, discard the skin and dice the meat in small pieces. Set aside.
Brown the duck bones in a skillet over high heat. Place in a soup pot with chicken stock. Bring to a boil and simmer for 35 minutes. Degrease and strain the stock. Set aside.
Wash the wild rice and soak in cold water for 30 minutes. In the soup pot, sautT the onion, leeks, mushrooms and celery in hot oil (or duck fat) without browning. Drain the wild rice and add to vegetables. Pour in the strained stock. Cook at a simmer for 45 minutes.
Add the cider vinegar and duck meat. Season with salt and pepper to taste. Cook 15 more minutes. Serve with a garnish of chopped parsley.
