Duisburg zoo have only one species of bustard, the Kori bustard, Ardeotis kori, and that's the photo But they have both subspecies together (Ardeotis kori kori and Ardeotis kori struthiunculus) in the enclosure mixed with Kirk's dik-diks, just passed the Australian zone If you're looking about the subspecies, by my side I'm unable to distinguish them....
