Only two of 180 tagged koalas relocated by the State Government for Gold Coast development between 2008 and 2014 have been rediscovered.
Saunder Havill Consultants say 632 hectares of bushland had disappeared around Coomera since 2006, and this forced relocation could be the reason for the decline of koala populations.
Queensland's koala translocation policy has been under review since August 2018.