These include haplorhine primates, squirrels, some birds, red kangaroo, and pig. The kangaroo and emu feature on the Australian coat of arms. Roo is a young kangaroo, or joey. Other skins, such as antelope, cow, kangaroo, or horse can be used as well. Kanga is a female kangaroo and the doting mother of Roo. The shield is supported by a red kangaroo and an emu. The long muscular tail was similar to that of a kangaroo. He is first criticized by the sour kangaroo and her joey. Groups of kangaroo rats that exist are aggregations and colonies. Recently examined fossilised footprints also suggest historical distribution of the species on Kangaroo Island. It is also known as the great grey kangaroo and the forester kangaroo. Vigilance and grouping in the eastern grey kangaroo, "Macropus giganteus". Another popular stretch runs beneath the Kangaroo Point Cliffs between South Brisbane and Kangaroo Point. They are an introduced species on Kangaroo Island. There are dense populations on the western seaboard of Kangaroo Island.