@nikola: Thanks for all of the almost 3,000 photos that you've uploaded onto ZooChat (including this one of a gibbon enclosure) but I am curious as to your use of the word "paddock". In many nations a paddock is a grassy field or primarily an enclosure for some kind of hoofstock, but I've noticed that you use the term to describe exhibits featuring a variety of animals. Since you live in Poland is the word "paddock" used to describe all enclosures in that country?
I would think it more likely that it is just that English is a convoluted language and translations don't always come out the way that they are intended.
there's a gibbon sort of centre-right, at the front....... and it looks like there is also an orangutan just visible on the far right (both arms up, gripping a branch) just above the peoples' heads. (Basically, where all the visitors' heads are pointing )