Female Red Kangaroo: This species is a very large kangaroo with short, red-brown fur, fading to pale buff below and on the limbs. It has long, pointed earlobes and a squared-off muzzle. Females are smaller than males and are blue-grey with a brown tinge, pale grey below, although arid zone females are colored more like males. It has two forelimbs with small claws, two muscular hind-limbs, which are used for jumping, and a strong tail which is often used to create a tripod when standing upright.

The Red Kangaroo's legs work much like a rubber band. The males can leap over 9 metres (30 ft) in one leap.

Males grow up to a body length of 1.4 metres (4 ft 7 in) long and weigh up to 85 kilograms (190 lb). Females reach a body length of up to 1.1 metres (3 ft 7 in) long and weigh up to 35 kilograms (77 lb). Tails can be from 0.9 to 1 metre (3.0–3.3 ft) long. The average Red Kangaroo stands approximately 1.5 metres (4 ft 11 in) tall.[4] Accounts of sizes greater than this are not uncommon, with some large males reportedly reaching approximately 2 metres (6 ft 7 in).

The Red Kangaroo maintains its internal temperature at a point of homeostasis about 36 °C (97 °F) using a variety of physical, physiological, and behavioral adaptations. These include having an insulating layer of fur, being less active and staying in the shade when temperatures are high, panting, sweating, and licking its forelimbs.

The Red Kangaroo's range of vision is approximately 300°, due to the position of its eyes.