The 2008 release of 12 orphan chimpanzees into the wild using sophisticated GPS tracking technology has been deemed a success by the project team. The release was the first of its kind to use VHF-GPS store-on-board ARGOS tracking collars to monitor the progress of the chimpanzees. It is also only the second time that rehabilitated chimpanzees have been released back into the wild in an area where other wild chimpanzees live.