@Coelacanth18 There is still an old-style cage used for the Hooded Capuchins in the winter months, which is very likely the ones depicted in this image. I want to say it was the cage featured in this image but I swore they were much smaller than this image. The langurs and genoun are no longer held there. The langur may have moved to the modern primate area as there was a reference to a 'gibbon-langur habitat' with no animals outside or species signage.