England's Dr Jane Goodall (L), chimpanzee researcher and naturalist, listens to sounds from the inside of a traditional Aboriginal Didjeridoo with Aboriginal dancer Dianne McNaboe of the Wiradjuri Tribe after a womens cleaning ceremony which was performed by McNaboe on the banks of MacQuarie River at Dubbo in western New South Wales, September 3. Goodall visited the Western Plains Zoo is in Australia to raise the awareness that Chimpanzee numbers in the wild have plummeted 75 percent in 10 years leaving only about 250,000 in their homeland's of Central and West Africa.