Some Przewalski's horses were provided to a release program in Mongolia.I know, MRJ
I was giving an example of an ex situ breeding programme that saved a species from extinction and allowed some captives to be sent to their original home.
Apart from the orang-utans, are there any other examples of exotic species that have been bred in Australian zoos as part of a reintroduction programme?
However the premise of your question is incorrect. These animals just happened to be available when an opportunity arose. Neither the orangutan or the horses were bred as part of a reintroduction program.