What is your ''German Big Five'' (''Deutsche top 5 Tierpark'') or the best 5 zoos in Germany according you. I am trying to choose what German zoo to visit next (in the following 8-12 months) (I have only visited Tierpark Hellabrunn insofar), and I am particulary interested to see bonobo, okapi, Eastern black rhino, and koala, and interesting collection of venomous snakes. ??? I read that Magdeburg zoo has very high-quality exhibits? But don't have okapis. Who is more attractive in general - Cologne or Frankfurt zoo?