Top 15 Fascinating Facts About Giraffes

The giraffe's front and rear legs are nearly the same length. The radius and length of the front legs are connected by a wrist joint, which functions similarly to a human wrist, acting as a knee. A special ligament seems to allow these long legs to support the giraffe's tremendous weight. The giraffe's legs measure about 30 cm in diameter, with the males having hooves that are 15 cm tall and the females' hooves reaching 10 cm. The back of each hoof is lower and positioned closer to the ground, giving extra support. Giraffes do not have sweat or scent glands between their toes. Their pelvis, while relatively short, has a protruding ilium at both upper ends.

Giraffes have two main gaits: walking and galloping. When walking, they move both legs on one side of their body simultaneously, then repeat the motion on the other side. While galloping, the back legs swing around the front legs before advancing, and the tail curls up. The giraffe uses the forward and backward movement of its head and neck to balance and resist the momentum during galloping. They can reach speeds of 60 km/h (37 mph) in short bursts and maintain 50 km/h (31 mph) for a few kilometers.

To rest, giraffes lie down by folding their legs underneath their body. They kneel on their front legs before lowering the rest of their body to the ground. To get back up, they first bend their knees and spread their back legs to lift their body, then extend their front legs. As they walk, giraffes tend to sway their heads. In captivity, giraffes sleep intermittently for about 4.6 hours each night, usually lying down, though standing sleep has been observed, especially in older giraffes.

Short, intermittent periods of deep sleep, while lying down, are marked by the giraffe arching its neck backward and resting its head on its hip or thigh. This is thought to represent paradoxical sleep. When drinking, the giraffe will spread its front legs or bend its knees. Despite their long legs, giraffes are not skilled swimmers, although they can float. The weight of their front legs makes it difficult for them to coordinate their neck and legs and keep their head above water while swimming.

The giraffe has an exceptionally long neck, reaching lengths of 2–2.4 meters, which accounts for a large portion of its vertical height. This long neck results from asymmetrical elongation of the cervical vertebrae, not from the addition of extra vertebrae. Each of these vertebrae measures over 28 cm in length. These vertebrae make up 52–54% of the giraffe's total spinal length, compared to the 27–33% typical of other large ungulates, including the giraffe's closest living relative, the okapi. This elongation mainly occurs after birth, likely because giving birth to a fully grown giraffe with an adult-sized neck would be too difficult for the mother. The giraffe’s head and neck are supported by large muscles and reinforced nuchal ligaments, anchored by long spines on the anterior thoracic vertebrae, giving the animal a prominent hump.

The giraffe’s cervical vertebrae are ball-and-socket joints. Specifically, the atlas joint allows the giraffe to tilt its head vertically and extend its reach with its tongue. The point of articulation between the cervical and thoracic vertebrae is shifted, lying between the first and second thoracic vertebrae.

Several hypotheses exist regarding the evolutionary origins and maintenance of the giraffe's long neck. The "competitive browsing hypothesis," first proposed by Charles Darwin and recently tested, suggests that competition with smaller browsers like kudu, steenbok, and impala pushed the giraffe to evolve a longer neck to reach food that these competitors could not access. This advantage is real, as giraffes can forage at heights up to 4.5 meters, while even large competitors like kudu can only feed at around 2 meters.

Another theory, the sexual selection hypothesis, posits that the long neck evolved as a secondary sexual trait, giving male giraffes an advantage in "necking" contests (see below) to establish dominance and secure access to mating opportunities. Supporting this theory, males have longer and heavier necks than females of the same age, and these necks are used in combat rather than other forms of fighting. However, critics argue that this theory does not explain why female giraffes also have long necks. It is also suggested that the long neck helps giraffes remain alert and spot predators from afar.

In mammals, the left recurrent laryngeal nerve is longer than the right; in giraffes, this nerve can extend over 30 cm. These nerves in giraffes are the longest of any living animal, with the left nerve exceeding 2 meters. Each nerve in this pathway begins in the brainstem, travels down the neck along the vagus nerve, and then branches into the recurrent laryngeal nerve, which loops back up the neck to the larynx. As a result, these nerves can be nearly 5 meters long in the largest giraffes. The structure of the giraffe's brain is similar to that of domesticated cattle, and it stays cool by releasing heat through evaporation in the nasal passages. Its skeletal structure results in a relatively small lung volume compared to its mass. The long neck adds significant dead space, although the trachea is narrow. These factors contribute to an increased resistance to airflow. Nevertheless, the animal is still able to supply enough oxygen to its tissues and can accelerate its breathing rate and oxygen diffusion when running.

The giraffe’s circulatory system has several adaptations to support its great height. Its heart, which can weigh over 11 kg and be around 60 cm long, needs to generate twice the blood pressure required in humans to maintain blood flow to the brain. Consequently, the heart wall can be up to 7.5 cm thick. Giraffes have an unusually high heart rate for their size, with 150 beats per minute. When the animal lowers its head, the blood tends to pool, and a prominent vein appears on the upper neck, with a large cross-sectional area that helps prevent excessive blood flow to the brain. Upon raising the head, the veins constrict, ensuring blood is directed back to the brain, preventing fainting. The giraffe’s rectangular veins contain several valves (often seven) to prevent blood from flowing backward into the head from the inferior vena cava and right atrium while the head is lowered. Conversely, the veins in the giraffe’s lower legs endure high pressure due to the weight of the fluids pressing on them. To mitigate this, the skin on the lower legs is thick and tight, preventing excessive blood from pooling.

The giraffe has an exceptionally strong esophagus that allows it to regurgitate food from the stomach back up to the neck and mouth for re-chewing. Like all ruminants, it has four stomach chambers, with the first chamber adapted to its specialized diet. An adult giraffe’s intestines stretch over 70 meters in length, and it has a relatively small ratio of small to large intestine. The giraffe’s liver is small and compact, and its gallbladder, present during fetal development, may disappear before birth.

In South Africa, male giraffes participate in low-intensity necking battles to establish dominance, particularly in the Ithala Game Reserve, KwaZulu-Natal. Giraffes use their necks as weapons in a behavior known as 'necking.' This neck biting is used to assert dominance, and males that win these necking contests have higher reproductive success. The behavior can vary in intensity. In low-intensity battles, the combatants simply rub against each other and lean into one another. The male with more stamina typically wins. In high-intensity necking, the combatants spread their front legs and swing their necks, trying to land a blow with their skulls. Contestants attempt to dodge each other's blows before retaliating. The force of a strike depends on the weight of the skull and the angle of the swing. While most contests do not result in severe injury, there have been reports of broken jaws, necks, and even fatalities. After these battles, the two males often engage in mutual grooming and courtship behavior.

Such interactions between males have been found to be more frequent than opposite-sex pair bonding. In one study, up to 94% of observed interactions were between males. The rate of same-sex activity varied between 30-75%, while only about 1% of same-sex interactions involved females.

Giraffes typically inhabit savannas and open woodlands. They prefer environments with Acacia, Commiphora, Combretum, and Terminalia trees over more densely wooded areas like Brachystegia forests. The Angola giraffe is found in desert habitats. Their diet consists mainly of tree branches, especially from the Acacia subfamily and Commiphora and Terminalia genera, providing essential calcium and protein for their growth. They also eat shrubs, grasses, and fruits. A giraffe consumes around 34 kg of leaves daily. Under stress, they may chew on tree bark. While herbivores, giraffes are also known to scavenge, licking dried meat off bones.

During the rainy season, when food is abundant, giraffes spread out, but in the dry season, they gather around the remaining evergreen trees and shrubs. Female giraffes tend to feed in more open areas, possibly to better detect predators, although this may reduce feeding efficiency. As ruminants, giraffes first chew their food, swallow it for further processing, and then regurgitate it to chew again, producing saliva while feeding. Giraffes need significantly less food than other herbivores because the leaves they consume are nutrient-dense, and their digestive system is more efficient. Their droppings are small pellets. When they have access to water, giraffes drink no more than once every three days.

Giraffes have a notable impact on the trees they feed on, delaying the growth of saplings for several years and creating 'waists' on taller trees. They feed most heavily during the early morning and late evening hours. During the day, they typically stand and ruminate. The main rumination activity takes place at night, when they primarily lie down.

Giraffes are often found in groups of varying sizes and compositions, influenced by ecological factors, human presence, time, and social dynamics. Traditionally, these groups are described as open and ever-changing. For research purposes, a "group" is defined as a collection of individuals less than a kilometer apart, moving in the same direction. Recent studies have shown that giraffes form long-lasting social relationships and can create groups or pairs based on family ties, gender, or other factors. These groups may often merge into larger communities or subgroups within a more fragmented or unified society. A giraffe group can include up to 66 individuals.

While giraffe groups tend to be sex-segregated, mixed-sex groups, including adult females and young males, have also been observed. The most stable giraffe groups are those consisting of mothers and their calves, which can remain intact for weeks or even months. The social bonds in these groups are maintained through the relationships between the calves. Female associations seem to be more space-dependent, and individuals may have matrilineal connections. Generally, females are more selective than males when associating with same-sex individuals. Young males also form groups and engage in necking contests. However, as they age, males become more solitary but may still form pairs or join female groups.

Giraffes do not have territories, but they do have home ranges that fluctuate based on rainfall and proximity to human settlements. Male giraffes sometimes wander beyond their usual areas. Although giraffes are generally quiet and lack vocal communication, they are capable of producing various sounds. During courtship, males emit loud grunts. Females call to their calves with a low growl. Calves make snorting, panting, whimpering, and whining sounds. Giraffes also grunt, hiss, moan, and create whistling-like noises. At night, giraffes seem to hum in low-frequency ranges, though the purpose of this behavior remains unclear.

Giraffe reproduction is polygamous: older males mate with females who are capable of reproduction. Males assess a female’s fertility by tasting her urine, a process called the Flehmen response. They generally prefer mature females over younger or older ones. Once a female in estrus is detected, the male will court her. During courtship, dominant males may cause subordinate females to feel uneasy. A courting male may lick the female's tail, rest his head and neck on her body, or nudge her with his horns. During mating, the male stands on his hind legs, raises his head, and places his front legs on either side of the female.

Giraffe pregnancies last between 400 and 460 days, after which a single calf is born, though twins are rare. The mother delivers while standing. The calf emerges head-first with its front legs, and the amniotic sac is broken as the calf falls, severing the umbilical cord. The mother then licks the newborn and helps it stand. A newborn giraffe is about 1.7 to 2 meters tall. Within hours, the calf can walk and is almost indistinguishable from a one-week-old calf. However, in the first 1-3 weeks, the calf spends much of its time hiding, its coat providing camouflage. The ossicones, which were flat at birth, begin to harden within a few days.

Mother giraffes with calves often form nursery herds, moving and foraging together. In such groups, mothers may leave their calves with another female while they feed or drink elsewhere. This is called a “calf pool.” Adult males play no significant role in raising the young, although they may interact in a friendly manner. Calves are at risk of predation, and mothers will stand over their calves, kicking at approaching threats. Females observing the calf pool will only alert their own calves if they notice a disturbance, although other females remain alert and attentive.

The length of time a calf stays with its mother varies, sometimes lasting until the mother gives birth again. Similarly, a calf may nurse for as little as one month or as long as a year. Female giraffes reach sexual maturity at about four years of age, while males mature around four to five years old. Male sperm production begins at three to four years of age, but they must wait until they are at least seven to mate.

Giraffes have a high survival rate once they reach maturity, and they can live for an unusually long time compared to other ruminants, up to 38 years. Due to their size, vision, and powerful kicks, adult giraffes are rarely preyed upon, although lions will occasionally target individuals weighing up to 550 kg. In Kruger National Park, giraffes are the most common prey for large cats, accounting for nearly a third of the meat consumed, although only a small portion of giraffes are killed by predators—most are likely scavenged after death. Nile crocodiles also pose a threat to giraffes when they lean down to drink. Calves are much more vulnerable than adults and fall prey to leopards, spotted hyenas, and wild dogs.

Between a quarter and half of giraffe calves survive to adulthood. The survival rate varies by birth season, with calves born in the dry season having higher chances of survival. The seasonal presence of migrating wildebeest herds and zebras helps reduce predation pressure on giraffe calves, increasing their likelihood of survival. On the other hand, some suggest that hoofed animals may benefit from associating with giraffes, as their height allows them to spot predators from a greater distance. Zebras, in particular, gather information about predator threats from giraffes' body language, spending less time scanning the environment when giraffes are present.

Giraffes also host a variety of parasites. They are often infested with ticks, particularly around the genital area, where the skin is thinner. Common tick species include those from the genera Hyalomma, Amblyomma, and Rhipicephalus. Giraffes rely on birds such as red-billed and yellow-billed oxpeckers to clean ticks and warn them of potential threats. As hosts to numerous internal parasites, giraffes are susceptible to a variety of diseases. They have suffered from a now-eliminated viral disease, and they can also develop skin disorders, characterized by wrinkles, lesions, or rough patches. In Tanzania, a roundworm infection seems to be the cause, often exacerbated by secondary infections. In Ruaha National Park, up to 79% of giraffes show signs of this condition, although it is non-fatal in Tarangire and less common in more fertile areas.

Giraffes possess an extraordinarily large heart, weighing about 12kg. When a giraffe raises its head, the blood vessels in its head redirect nearly all the blood to the brain, bypassing other parts of the head like the jaw, tongue, and skin. At the same time, its thick skin and a unique bundle of muscles in the veins, which are usually absent in other veins, help maintain blood pressure, enabling the veins to return blood from the head to the heart.

When the giraffe lowers its head to the ground, the blood rushes to the brain, and the blood pressure doubles. As it raises its head again to browse leaves, the blood quickly drains back.

This is similar to what happens with humans. You might feel lightheaded or see your face flush if you were to hang upside down for too long, and you would quickly flip yourself back right side up. If your blood pressure drops too low and there isn’t enough blood flowing to the brain, you could faint.

With their long necks, giraffes spend most of their time raising and lowering their heads, so they need an efficient system to ensure proper blood circulation to the brain, preventing dizziness. Scientists once thought that the blood vessels in their necks played a key role in pumping blood from the heart to the brain. However, Mitchell’s research suggests that giraffes use a powerful pump-like mechanism to push blood upwards, and their blood pressure is twice as high as ours.

According to Livescience, giraffe populations have declined by 40% worldwide over the past 30 years, dropping from around 151,702 individuals in 1985 to just 97,562 by 2015. The International Union for Conservation of Nature (IUCN) raised concerns about this alarming trend during the 13th Conference of the Convention on Biological Diversity in Cancun, Mexico, held from December 4-17, 2016.

Giraffes (scientific name: Giraffa Camelopardalis) are native to southern and eastern Africa, with a small population in the western and central parts of the continent. Once considered a species of “least concern” by the IUCN Red List, signaling their broad distribution and abundant numbers, giraffes have seen their population severely reduced due to habitat loss, civil unrest, and illegal poaching.

Out of the 9 giraffe subspecies, the IUCN reports that 3 are showing population growth, 5 are declining, and 1 remains stable.

In response to this critical decline, the IUCN’s International Conservation Conference passed a resolution with support from member countries, UN officials, and other organizations. This includes raising awareness about the giraffe population decline, restoring wildlife sanctuary integrity, and supporting ongoing giraffe conservation plans and actions.

In space, blood circulation behaves differently than on Earth. The circulatory system in the legs has to work harder to pump blood back up, causing the veins to become weak and near inactive, which can be dangerous for humans when they return to Earth.

However, giraffes, especially calves, are unique in that they can learn to stand immediately after birth thanks to their rapidly developing leg veins. NASA, upon observing this, created a device that involved attaching a vacuum-sealed tube around astronauts' waists. The vacuum force causes the leg veins to expand, promoting normal blood circulation.

Additionally, drinking water is a serious challenge for giraffes. To drink, they have to spread their front legs wide and awkwardly bend down, putting them in a vulnerable position for predators like crocodiles. However, giraffes' digestive system allows them to absorb almost all the water they need from the vegetation they consume. Young giraffes can apply this technique effectively. Interestingly, giraffes never sweat or pant to cool down. Instead, they allow their body temperature to fluctuate with the surrounding environment to conserve water.

Here are some other intriguing facts about giraffes:

• Giraffes are the tallest mammals on Earth. Just their legs alone are as tall as an average adult human, measuring around 180cm.
• Giraffes only need to drink water once every few days. They absorb most of the water they need through the plants they eat.
• Giraffes spend most of their lives standing, even sleeping and giving birth while standing.
• Newborn giraffes can stand and walk just hours after birth. Within a few weeks, they begin to feed on their first leaves.
• Despite being closely protected by their mothers, many young giraffes fall prey to lions, leopards, and African wild dogs in their early months.
• The spots on a giraffe's body are unique, just like human fingerprints. No two giraffes have exactly the same spot pattern.
• Both male and female giraffes have two ossicones, which are covered in fur. Males sometimes use their ossicones to fight other males.
• Giraffes sleep only about 5 to 30 minutes per day, typically taking short naps of about 2 minutes at a time.
• Giraffes often make low grunting sounds, snorts, and hisses.

Giraffes are covered in a patchwork of uneven spots that range from yellow to black, with patterns of white, light brown, and yellow hues. Male giraffes typically reach heights of 4.8 to 5.5 meters (16 to 18 feet) and can weigh as much as 1,300 kilograms (3,000 pounds). The tallest recorded giraffe stood at 5.87 meters (19.2 feet) tall and weighed approximately 2,000 kilograms (4,400 pounds). Female giraffes are generally shorter and lighter, weighing around 828 kilograms.

Giraffes are part of the same family as deer and cattle but belong to their own distinct family, Giraffidae, which includes the giraffe and its closest relative, the okapi. Their range spans across sub-Saharan Africa, from Chad to South Africa.

Giraffes can thrive in grasslands, savannas, and mountainous regions. However, when food becomes scarce, they are known to venture into more densely vegetated areas. They typically prefer habitats with abundant acacia trees and can survive for extended periods without drinking water, as they derive moisture from the vegetation they consume.

Giraffes are fast runners and can reach speeds of up to 55 km/h in short bursts, allowing them to outrun a racehorse over a limited distance.

Their long necks also play a key role in their social and mating behavior. Male giraffes often engage in 'necking' contests, where they twist their necks together in an elegant display before engaging in more aggressive physical fights to assert dominance.

The International Union for Conservation of Nature (IUCN) currently recognizes a single species of giraffe, which is divided into nine subspecies. In 2001, a proposal to categorize them into two species was made. A 2007 genetic study on giraffes identified six distinct species: West African, Rothschild, Reticulated, Masai, Angola, and South African giraffes. The study revealed that these populations are reproductively isolated with minimal interbreeding, despite no natural barriers preventing them from intermingling. This includes adjacent populations of Rothschild's giraffe, Reticulated giraffe, and Masai giraffe. The Masai giraffe is also believed to be composed of two species separated by the Great Rift Valley. The Reticulated and Masai giraffes were found to have the highest mitochondrial DNA diversity, aligning with giraffes native to East Africa.

Populations to the north are more closely related to previous groups, while those to the south are more closely tied to later ones. Giraffes appear to select mates with similar coat patterns, a feature passed down to their calves. A 2011 study using detailed morphological analyses and the concept of speciation described eight living giraffe species. A 2016 study also concluded that giraffes should be considered as multiple species. Researchers suggested that four species have not exchanged genetic information for 1 to 2 million years. A response to this publication raised seven concerns regarding the interpretation of the data, ultimately concluding that the findings should not be accepted without further scrutiny.

A 2020 study revealed that depending on the classification method used, different hypotheses recognize anywhere from two to six giraffe species. The study also indicated that methods which combine multiple species may lead to excessive taxonomic splitting, as they focus more on geographical structure than true species differentiation. The three-species hypothesis, recognizing G. camelopardalis, G. giraffa, and G. tippelskirchi, is strongly supported by phylogenetic analyses and corroborated by most population and multispecies synthesis studies.

Fully grown giraffes stand between 4.3 to 5.7 meters tall, with males being taller than females. The tallest male recorded was 5.88 meters, while the tallest female reached 5.17 meters. The average weight for an adult male giraffe is 1,192 kg, while females average 828 kg, with maximum recorded weights of 1,930 kg for males and 1,180 kg for females. Despite their long necks and legs, giraffes have relatively short bodies. Their large, bulging eyes are positioned on either side of their heads, giving them a wide field of vision from great heights. Giraffes are able to see in color and have sharp hearing and smell senses. Their nostrils can be closed to protect against sandstorms and ants. The giraffe’s tongue is about 45 cm long and dark purple in color, likely to prevent sunburn. It is highly useful for grasping tree leaves, grooming, and cleaning their nostrils. The upper lip is also prehensile and covered in fur to protect it from thorns.

Giraffes are covered in a coat with dark patches or spots (ranging from orange, chestnut, brown, to almost black), separated by lighter fur, usually white or cream. Male giraffes become darker as they age. Their coat pattern has been identified as a form of camouflage, helping them blend into the dappled light and shadows of savannah woodlands. When standing among trees and shrubs, they are difficult to spot from a few meters away. However, adult giraffes rely on their height and ability to detect predators rather than relying solely on camouflage, which is likely more important for calves. Each giraffe has a unique coat pattern, with some traits inherited from their mothers. Variations in these traits may correlate with higher survival rates for calves. The skin beneath the patches may function as a heat regulation system, containing a complex network of blood vessels and sweat glands.

The giraffe’s skin is mostly gray or tan, with a thickness that allows the animal to pass through thorny bushes without injury. Their coat also acts as a chemical defense, with its distinctive odor containing at least 11 different aromatic chemicals, including indole and 3-methylindole, which are responsible for most of the smell. Males emit a stronger scent than females, which may have a role in sexual attraction. Along the neck, giraffes have a short, upright mane of hairs. Their long, one-meter tail ends in a tuft of dark hair, which they use to swat away insects.