and is almost 2 m ( 6 ft. ) tall . Its scientific name , Macropus giganteus means gigantic ( huge ) large-foot , and the Eastern Grey is the second biggest marsupial on earth . and stands almost 2 m ( 6 ft. ) tall , the scientific name , Macropus giganteus ( gigantic large-foot ) , is misleading , as the Red Kangaroo of the semi-arid inland is , at 85 kg , larger .