They belong Hannover zoo and will return to Hannover after the Alaska Exhibit Yukon Bay is finished-if some of them are still alive til then.Unfortunately, three of the caribous went across the Yukon within a few days at the Wisentgehege Springe. The Zoo send them over, because their exhibit is gone to build a new australia adventure world.( please appologize the word game. I don't know, if people outside of germany understand it, in germany, some people say if somebody died,"he went across the Jordan, that's why I said, the caribous went across the Yukon....)