# Giraffe Region: Africa Source: https://spinplanet.app/animals/en/giraffe/ The giraffe is the tallest animal in the world. Its very long neck lets it reach high leaves that other animals can't. Like human fingerprints, every giraffe's pattern is different. ## Quick facts - **Habitat**: It lives in the acacia woods of savannas and woodlands. - **Diet**: Acacia leaves are its favorite food. - **Size and weight**: Height 5–6m, as tall as a two-story building. - **Lifespan**: 20–25 years - **Conservation status**: Vulnerable - **Fun facts**: A giraffe's tongue is 50cm long and purple! / Even with its long neck, it has just seven neck bones, the same as a human. ## Learn more ### The giant of the savanna — secrets of the giraffe Field Safari Encyclopedia Let's discover the hidden abilities of the tallest animal in the world. ### A stride as tall as a two-story building The largest animal walking the land - A male giraffe can stand up to 5.5m tall, as high as a two-story building. - It's massive, weighing up to 1,700kg. - It usually walks at a relaxed pace, but can run very fast when it senses danger. ### There are actually 4 kinds of giraffes! A new fact revealed by genetic analysis (as of 2025) - **Northern giraffe** — the most critically endangered, with about 7,037 remaining. - **Reticulated giraffe** — known for its polygon-shaped pattern, with about 20,901 living today. - **Masai giraffe** — has leaf-shaped spots, with a stable population of about 43,926. - **Southern giraffe** — the most numerous species, with about 68,837 individuals. ### Walking bioengineering Remarkable evolution to withstand extreme physical stress - A special network of blood vessels that prevents brain hemorrhage - A 10kg super heart that defies gravity - G-suit legs that prevent blood from pooling ### A 10kg super engine A heart that pumps blood all the way to the head - A giraffe's heart is a massive engine, 60cm long and weighing over 10kg. - To push blood up against gravity to the brain, it generates blood pressure twice that of a typical animal. - To withstand such powerful pressure, the walls of a giraffe's cardiovascular system have evolved to be very thick. ### Why it doesn't faint when drinking water A magical sponge that prevents brain hemorrhage - Like humans, it has 7 neck bones, but each one is unusually long. - Near the top of the neck is a sponge-like network of tiny blood vessels called the 'rete mirabile.' - When it lowers its head, this network perfectly prevents excess blood from rushing to the brain. ### A natural G-suit worn on its legs The secret to sturdy legs that never swell - The blood vessels in a giraffe's legs face immense downward pressure from the weight of bodily fluid. - In a typical animal, this pressure would burst the blood vessels, but the giraffe's very tough, thick skin wraps tightly around its legs. - This works on exactly the same principle as the "G-suits" fighter pilots wear to withstand gravitational force. ### A 50cm rough tongue A meal that isn't afraid of acacia thorns - A giraffe's tongue can stretch out as far as 40–50cm, easily wrapping around leaves on high branches. - It's a hearty eater, consuming over 63kg of leaves and twigs a day. - Its tongue and lips are very thick and rough, so it can chew on the sharp thorns of acacia trees without getting hurt. ### It sleeps just 2 hours a day The mammal with the shortest sleep time - A giraffe sleeps only about 1.9–2 hours out of every 24. - Each nap is very short and deep (REM sleep), lasting around 5 minutes, and is split into several sessions. - Most of this sleep happens while standing, crouched, rather than lying down on the ground. ### Why doesn't it sleep more? A sad evolution shaped by survival needs - **Predator threats** — its huge size makes it an easy target for lions or leopards while lying down, and it takes a long time to get back up. - **Endless digestion** — as an herbivore, it spends the whole day eating huge amounts of leaves and ruminating (chewing its cud). - **Maintaining body heat** — with its large body and long neck, sleeping too long could cause its body temperature to drop, so it stays awake. ### A silent conversation A secret frequency the human ear can't hear - Giraffes are known as quiet animals, since they don't usually make vocal calls. - But recent research has found they communicate with each other using 'infrasound,' frequencies too low for human ears to hear. - Especially at night, they use this secret communication to warn the herd of danger or to find a mate. ## More animals from this region - [Lion](https://spinplanet.app/animals/en/lion/) - [African Elephant](https://spinplanet.app/animals/en/elephant/) - [Zebra](https://spinplanet.app/animals/en/zebra/) - [Cheetah](https://spinplanet.app/animals/en/cheetah/) - [Hippopotamus](https://spinplanet.app/animals/en/hippo/) - [Rhinoceros](https://spinplanet.app/animals/en/rhino/) --- All images and videos were made with AI to capture each animal's features, so they may look different from the real animals. The animal information comes from public sources and may contain mistakes.