Houston has the Mucky Duck (which is the official name, not a nickname) instead of the Dirty Duck, but the mascot is still a black swan. It's carved wood and sits on a shelf over the bar. It used to sit by the cash register but some idiot tried to steal it. While the bar guy was processing his tab, the dude grabbed the swan and ran out the back door. Fortunately, he had paid by credit card so the pub had all his information and the swan was recovered in short order. Don't you love stupid/intoxicated criminals?