Thanks for sharing the picture, Goura. Interesting species for sure. They are however no longer kept at Antwerp Zoo and I cannot remember ever seeing them so they've probably not been there for quite some time. According to Zootierliste the species was present at Antwerp Zoo until at least 1999.
@KevinB Yes, as stated in my comments this photo was taken with a manual camera in about 1991 - apparently only Plzen still has one but I didn't see it on my visit in April
