Red Kangaroos have a white facial stripe from the corner of the mouth towards the ear. The amount of hairless rhinarium (skin on the tip of the nose) is dusky coloured and intermediate between the narrow band of Grey Kangaroos and the broad one of Euros. Males continue to grow through life and may reach 90 kg in weight. A 92 kg male was caught at Stubberfields Tank in Sturt National Park and this remains the largest individual in the many studies on this species. Males are typically red coloured (lighter in summer and dark rusty red in winter). Females may grow to 40 kg but usually range around 25-30 kg. They are typically blue-grey. However, the colouration of the two sexes grades into each other with small percentage of grey males and red females and some intermediate shades. To confirm the sex of an individual you need to view the abdomen where the pouch opening of females or the scrotum of males is usually obvious.
Colouration of Red Kangaroos is not uniform. The abdomen and lower parts of the limbs are light grey to white but the nails of the feet and forepaws are black. The tail tip is always a light ochre colour that clearly distinguishes it from the black-tipped tailed of Grey Kangaroos. Red Kangaroos hop with their back almost parallel to the ground and their head low.