Preheat your oven to 350ºF. Season ducklings with salt and pepper. Melt the butter in a frying pan. Add ducklings and brown on all sides. Sprinkle with flour. Transfer ducklings to large casserole dish. Mix remaining ingredients together and pour over ducklings. Cover and bake, stirring occasionally. for 1 to 1 1/4 hours, or until the ducklings are tender. Remove from oven and serve. Serves 6 to 8