Original: Studies have shown that clear-felling operations , such as the logging run in state forest between the Yarra Ranges National Park and Mount Bullfight Conservation Reserve in February 2006 , lead to the deaths of most possums in the area - '' Adult animals have a strong affinity with their home range and are reluctant to move '' .
Simplified: Studies have shown that logging in the forest between the Yarra Valley National Park and Mount Bullfight Conservation Reserve in February 2006 , led to the deaths of most possums in the area .