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Hippos are recognisable for their barrel-shaped torsos, wide-opening mouths with large canine tusks, nearly hairless bodies, pillar-like legs, and large size: adults average 1,500 kg (3,300 lb) for bulls (males) and 1,300 kg (2,900 lb) for cows (females).
- Overview
- General characteristics
- Behaviour
- Reproduction and life cycle
- Distribution
hippopotamus, (Hippopotamus amphibius), amphibious African ungulate mammal. Often considered to be the second largest land animal (after the elephant), the hippopotamus is comparable in size and weight to the white rhinoceros (Ceratotherium simum) and the Indian rhinoceros (Rhinoceros unicornis).
Hippopotamus is Greek for “river horse,” and the animal has been known since ancient times. Hippopotamuses are often seen basking on the banks or sleeping in the waters of rivers, lakes, and swamps next to grasslands. Because of their great size and aquatic habits, they are safe from most predators but human beings, who have long valued their hide, meat, and ivory and at times have resented them for ruining crops. Once ranging over the entire continent and beyond, hippopotamuses (or “hippos”) now live in eastern, central, and parts of southern Africa.
The hippopotamus has a bulky body on stumpy legs, an enormous head, a short tail, and four toes on each foot. Each toe has a nail-like hoof. Males are usually 3.5 metres (11.5 feet) long, stand 1.5 metres (5 feet) tall, and weigh 3,200 kg (3.5 tons). In terms of physical size, males are the larger sex, weighing roughly 30 percent more than females. The skin is 5 cm (2 inches) thick on the flanks but thinner elsewhere and nearly hairless. Colour is grayish brown, with pinkish underparts. The mouth is half a metre wide and can gape 150° to show the teeth. The lower canines are sharp and may exceed 30 cm (12 inches).
Hippos are well adapted to aquatic life. The ears, eyes, and nostrils are located high on the head so that the rest of the body may remain submerged. The ears and nostrils can be folded shut to keep out water. The body is so dense that hippos can walk underwater, where they can hold their breath for five minutes. Although often seen basking in the sun, hippos lose water rapidly through the skin and become dehydrated without periodic dips. They must also retreat to the water to keep cool, for they do not sweat. Numerous skin glands release an oily reddish or pinkish “lotion,” which led to the ancient myth that hippos sweat blood; this pigment actually acts as a sunblock, filtering out ultraviolet radiation.
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Hippos favour shallow areas where they can sleep half-submerged (“rafting”). Their populations are limited by this “day living space,” which may become quite crowded; as many as 150 hippos may use one pool in the dry season. In times of drought or famine, they may embark on overland migrations that often result in many deaths. By night, hippos walk...
In the wild, females (cows) become sexually mature between ages 7 and 15, and males mature slightly earlier, between ages 6 and 13. In captivity, however, members of both sexes may become sexually mature as early as ages 3 and 4. Dominant bulls more than 20 years old, however, initiate most of the mating.
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Bulls monopolize areas in the river as mating territories for 12 years or more. Subordinate males are tolerated if they do not attempt to breed. Cows aggregate in these areas during the dry season, which is when most mating takes place. Rare battles may erupt when strange bulls invade territories in the mating season. Most aggression is noise, splash, bluff charges, and a yawning display of the teeth, but opponents may engage in combat by slashing upward at each other’s flanks with the lower incisors. Wounds can be fatal despite the thick skin there. Adjacent territorial bulls will stare at each other, then turn, and, with rear end out of the water, flip feces and urine in a wide arc by rapidly wagging the tail. This routine display indicates that the territory is occupied. Territorial and subordinate males alike make dung piles along pathways leading inland, which probably function as olfactory signposts (scent markers) at night. Hippos recognize individuals by scent and sometimes follow one another nose-to-tail on night treks.
Trampling and crop raiding by hippos led to early and determined efforts to exterminate them; their hides and meat were also valued. Hippos were extinct in northern Africa by 1800 and south of Natal and the Transvaal by 1900. They are still fairly common in East Africa, but populations continue to decrease continentwide. There remains a demand for ...
- Rivers, lakes & mangrove swamps
- sub-Saharan Africa, Colombia
- 40-50 years
- 13-18 ft (4 to 5.5 m)
- Hippos are the deadliest large land animal on the planet. The Hippopotamus is one of the most dangerous animals in the world, killing an estimated 500 people a year in Africa.
- Hippos love the water! The hippopotamus is a semi-aquatic mammal. This means that even though they’re a mammal like humans, dogs, cats, and other similar species, they spend a majority of their life in the water.
- There’s only one wild herd famous outside of Africa… And it has its roots entangled with Pablo Escobar! During his time, Escobar ran a private zoo which featured hippopotamuses.
- The hippo is a victim of ivory poaching. When you think about poaching and ivory, you probably think about rhinos and elephants. However, the hippopotamus is also a victim of this crime, which is another reason aside from habitat loss that they’re endangered.
Mar 10, 2011 · Males can reach lengths of 10.8 to 16.5 feet, and weigh up to 9,920 pounds, while females weigh up to 3,000 pounds. These muscular animals have round torsos and pinkish brown bodies with...
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Jul 9, 2020 · On average, a hippo’s length is between 10.8 and 16.5 feet, and their height is up to 5.2 feet tall at the shoulder. Appearance: Hippos are known for their rotund bodies. While the name...
Hippos are recognizable for their barrel-shaped torsos, wide-opening mouths with large canine tusks, nearly hairless bodies, pillar-like legs, and large size. The eyes, ears, and nostrils of hippos are placed high on the roof of their skulls.
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Learn more about hippopotamus, including how much they weight, how fast they can run on land and where to see in the wild – and stay safe from an attack.
