I had a slide of the one in Cincinnati, but I just checked my files and it is not there. When I consolidated my slides for a move a couple years ago I threw out all the mediocre ones and that one must have gone in the trash. If I had realized how rare those antelope are maybe I would have kept it.
Thanks ArizonaDocent.
Not only is a rare antelope. There are very few good photos available of them. And it seems that very few zoos, if any, have this species (www.Zootierliste.de).