Frankfurt Zoological Society (FZS)
www.zgf.de

Institute for Zoo and Wildlife Research (IZW)
www.izw-berlin.de

Perth Zoo - Western Australia
www.perthzoo.wa.gov.au

Dept. of Wildlife Ecology and Management, University of Freiburg
www.wildlife.uni-freiburg.de

The Australian Orangutan Project (AOP)|
www.orangutan.org