There the matter rested for over 100 years , and it was not until 1917 that researchers realised that the `` forester kangaroo '' of Tasmania was in fact `` Macropus giganteus '' , the same eastern grey kangaroo that was , and still is , widespread in the more fertile south-eastern part of the mainland .
There the matter rested for over 100 years , and it was not until 1917 that researchers realised that the `` forester kangaroo '' of Tasmania was in fact `` Macropus giganteus '' , the same western grey kangaroo that was , and still is , widespread in the more fertile south-eastern part of the mainland .