I went to Wellington Zoo the other day to take reference photos of animals. Here are some which came out quite well, if I do say so myself.
(I may as well point out here that my feelings towards zoos are conflicted: they give endangered species an alternative place to live and indeed with some species there are more of the animals in zoos than in the wild; but I always look at the size and quality of the cages and wonder if the animals can have a decent life there.)