Giraffes: The Tallest Mammals on Earth

Giraffes are the tallest mammals on Earth, a distinction made possible by their extraordinary necks and exceptionally long legs. A giraffe’s legs can measure roughly 6 feet (1.8 meters) from end to end, which means they can be taller than many fully grown people.

Despite their unusual proportions, giraffes are capable of moving surprisingly fast. Over short distances, they can reach speeds of about 35 miles per hour, while during longer periods of travel they can maintain a more moderate speed of approximately 10 miles per hour.

Behavior

Giraffes are commonly found moving across open grasslands in small social groups. A typical group may contain around six animals, although group composition can vary.

Male giraffes, called bulls, sometimes compete for dominance through a behavior known as “necking.” During these confrontations, two males swing their long necks and use their heads to strike one another. Although the clashes can look dramatic, they generally do not result in serious injuries. The contest usually finishes when one male acknowledges the other’s superiority and walks away.

Height and Feeding Adaptations

A giraffe’s remarkable stature allows it to reach vegetation that is inaccessible to most other herbivores. Its diet consists mainly of leaves, young shoots, and buds growing high above the ground, with acacia trees being one of its most important food sources.

The giraffe’s neck is only one part of its feeding adaptations. Its tongue is also unusually long, reaching about 21 inches (53 centimeters). This extended tongue allows the animal to wrap around branches and pull leaves away from them.

Feeding occupies a large portion of a giraffe’s daily routine. Like cattle, giraffes are ruminants, which means they regurgitate partially digested food and chew it again as cud before completing digestion.

Their enormous bodies also require substantial amounts of nourishment. Giraffes may eat hundreds of pounds of foliage over the course of a week and can travel considerable distances when searching for sufficient vegetation.

Their great height also offers a valuable defensive benefit. Standing high above the surrounding vegetation gives giraffes an excellent view across the African savanna, allowing them to spot potential predators from a considerable distance.

Challenges of Being Tall

Their impressive height provides many advantages, but it also comes with certain disadvantages.

Getting a drink can be particularly hazardous. When a giraffe approaches water, it must spread its front legs widely and bend its long neck downward into an awkward posture. While positioned this way, the animal is more exposed to predators such as lions and other large African cats.

Fortunately, giraffes do not have to drink water very often. They can go several days without drinking because much of the moisture they require comes from the vegetation they eat.

Birth and Early Life

Female giraffes give birth while standing rather than lying down. Consequently, a newborn calf experiences a sudden drop of more than 5 feet (1.5 meters) when it enters the world.

The young calf recovers from this dramatic beginning remarkably quickly. Within roughly half an hour of birth, a newborn giraffe can normally stand on its feet. Around 10 hours later, it is capable of running alongside its mother.

Population and Species

Giraffes are widely recognized for their distinctive spotted coats. Each giraffe has an individual pattern, much like a fingerprint, although animals living within the same geographical region often display broadly similar markings.

For many years, scientists classified all giraffes as members of a single species that was divided into several subspecies.

In 2016, however, researchers published genetic findings that challenged this traditional classification. Their DNA analysis indicated that giraffe populations could instead represent four distinct species, with measurable genetic differences separating them.