Adult cheetahs’ weight averages between 75 and 125 pounds. They can measure from 40 to 60 inches in length, measured from the head to the hind quarters. The tail can add a further 24 to 32 inches bringing the total overall length up to 7.5 feet. On average, cheetahs stand 28 to 36 inches tall at the shoulder.
The cheetah is a sexually dimorphic species though it is difficult to identify cheetahs’ sex by appearance alone. Male cheetahs are slightly bigger than females and they have larger heads, but they do not display the same degree of physical difference between the sexes of other big cat species like lions.
Cheetahs have a thin frame with a narrow waist and deep chest. They have large nostrils that allow for increased oxygen intake. Cheetahs have a large lungs and hearts connected to a circulatory system with strong arteries and adrenals that work in tandem to circulate oxygen through their blood very efficiently.
With its long legs and very slender body, the cheetah is quite different from all other cats and is the only member of its genus, Acinonyx. The cheetah’s unique morphology and physiology allow it to attain the extreme speeds for which it’s famous.
The cheetah’s undercoat ranges in color from light tan to a deep gold and is marked by solid black spots. These spots are not open like the rosettes found on a leopard or jaguar’s coat, which is one way to quickly identify the cheetah.
Distinctive black tear stripes run from the eyes to the mouth. The stripes are thought to protect the eyes from the sun’s glare. It is believed that they have the same function as a rifle scope, helping cheetahs focus on their prey at a long distance range by minimizing the glare of the sun.
Cheetah tails end with a bushy tuft encircled by five or six dark rings. These markings provide them with excellent camouflage while hunting and make them more difficult for other predators to detect. The tail is also thought to be a signaling device, helping young cubs follow their mothers in tall grass. The tip of the tail varies in color from white to black among individuals.
The cheetah is the world’s fastest land animal and Africa’s most endangered big cat. Uniquely adapted for speed, the cheetah is capable of reaching speeds greater than 110 kilometers per hour in just over three seconds. At top speed, their stride is seven meters long. The cheetah’s unique body structure: flexible spine, semi-retractable claws, long legs and tail allow it to achieve the unbelievable top speed of 110 km/hr (70 mph). The cheetah’s body is narrow and lightweight with long slender limbs. Specialized muscles allow for a greater swing to the limbs increasing acceleration.
Cheetahs’ foot pads are hard and less rounded than the other cats. The pads function like tire treads providing them with increased traction in fast, sharp turns. The short blunt claws, which are considered semi-retractable, are closer to that of a dog than of other cats. The claws work like the cleats of a track shoe to grip the ground for traction when running to help increase speed.
The flexibility of the cheetah’s spine is unique. The cheetah’s long muscular tail works like a rudder, stabilizing, and acting as a counterbalance to its body weight. Swinging the tail back and forth continually adjusting to the movement of prey allows for sudden sharp turns during high speed chases. The cheetah’s shoulder blade does not attach to the collar bone, thus allowing the shoulders to move freely.
The hips pivot to allow the rear legs to stretch far apart when the body is fully extended. The hip and shoulder extension allows for a large range of extension during running, thus making both its exceptional stride length. The length between their steps is six to seven meters (21 ft) and four strides are completed per second. There are two times in one stride when the cheetah’s body is completely off the ground: once when all four legs are extended and once when all four legs are bunched under the body.
