I'm looking for incidences of both successes and failures, particularly with apes. I am aware for the success of the golden lion tamarin reintroduction program. Others I know of (no sources though) are the Perth Zoo orangutan reintroductions (Temara - success?), Semeru (failure, died snakebite). Also the recent problems with the Aspinall gorilla reintroductions (details, news sources would help here). Any additional info appreciated.