Photos of the major exhibits of Berlin Tierpark have already been uploaded many times here on Zoochat, so I'll try to fill in some gaps by uploading photos of the less famous exhibits.
This is a small ornamental garden near the pheasantry. Karl Foerster was a famous German gardener, but I don't know if he had any formal/official affiliation with the Tierpark. In the garden are two aviaries. During my visit, they housed Jandaya parakeets and golden pheasants, but now one of them (I don't know which one) is home to red-and-white giant flying squirrels.