Duck and Wild Mushroom Gumbo

Name: Duck and Wild Mushroom Gumbo
Ingredients: 1 (12 ounce) bottle Abita Turbo Dog, or other stout beer; 1 (4 to 5 pound) duck, rinsed well and patted dry, excess fat removed; 1 1/2 cups finely chopped yellow onions; 1 1/2 pounds wild mushrooms (chanterelle, wood ear, shiitake, oyster), cleaned, stemmed and diced; 1 cup all purpose flour; 1 cup chopped green onions, green tops only, for garnish; 1 teaspoon dried thyme; 1/2 cup chopped parsley, for garnish; 1/2 teaspoon freshly ground black pepper; 1/4 cup vegetable oil; 1/4 teaspoon cayenne pepper; 2 tablespoons minced garlic; 3/4 cup finely chopped celery; 3/4 cup finely chopped green, red and/or yellow bell peppers; 4 teaspoons salt; 6 cups chicken stock; Steamed long or medium grain white rice, accompaniment