I enjoy taking pictures of animals, even if the are at the Zoo. It is a challege to get good pictures from Zoo. In my opinion there are two types of pictures that works really well, the ones that shows interaction between the visitors and the animals and the ones that doesn't show that the animals are in captivity. I show two images from Parken Zoo in Eskilstuna, Sweden. The first picture shows interaction between a Drill and a small boy.
The second picture shows a male Drill relaxing. The picture is taken through some small bushes to give a feeling of not being at Zoo and this also helps hiding fences.