Heat olive oil and butter in a large cooking pot over medium high heat. Add the ground duck, along with the next 13 ingredients in the above ingredient list. As the duck cooks, fold those ingredients into the meat in order for the flavors to become integrated together. Stir the meat frequently to ensure that it cooks evenly, about 13-15 minutes.
When duck is about done, drain the fat from the pot. This must be done because duck is high in fat content, more so than other meats. Once that is done, place pot back on stove and add the red potatoes to the pot and give the meat a few stirs to evenly distribute the ingredients. Add the next five ingredients in the ingredient list and stir the chili until everything is integrated and a good consistency is achieved. Lower the temperature to a low heat, cover the pot, and let simmer for two hours, stirring occasionally.
Taste chili from time to time, season with salt and pepper to taste. Serve in individual bowls with chopped cilantro on top, if desired.