And especially for apes, for example, the problem after World War II was there are a lot of parasites in apes. And during these times, you haven’t had the medicine to treat these parasites. And so the solution was to have clean enclosures that can be hosed down five to three times a year. And of course, this looks ugly because, as the name says, it looks like a bathroom. And Grzimek House and birdholes before, they were naturalistic exhibits and this was really an improvement. Also in the Grzimek house, all the rock work and most of the trees are artificial, But some are so well that even the zoo biologists have to look twice whether it’s artificial or whether it’s true. Nowadays, it’s a bigger problem energywise because with the heating, with the cooling. The Grzimek House houses small mammals, diurnal and nocturnal, and the nocturnal are in the reverse light system.
