Indonesian birds are especially threatened both by habitat loss and trapping for the cage-bird trade. This paper describes recent zoo-supported work at Cikananga Wildlife Center, Java, for the conservation breeding of a number of threatened passerine birds. The founder populations of these birds were obtained from local private bird keepers. Zoos and similar-minded conservation organizations have backed this work through both funding and technical support. Conservation breeding has been highly successful for the Black-winged starling Sturnus melanopterus and Sumatran laughingthrush Garrulax bicolor. A more recently initiated programme for Javan green magpie Cissa thalassina has already resulted in breeding success and another programme has recently been initiated for the Rufous-fronted laughingthrush Garrulax rufifrons. Reintroduction trials have already been initiated for Black-winged starling and others are at the planning stages.