Hippo's

 

This week we are looking at hippo’s aka hippopotamus they are what some refer to as stout and naked-skinned. They are semiaquatic artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically, their closest living relatives are the cetaceans. They are sometimes referred to as hippopotamids.

Their hooves are different from other ungulates, as they are more like fingernails. Their feet are webbed, which helps them move about in water.

They are found in the heart of Africa’s wetlands. These semi-aquatic creatures live in and around lakes, rivers, and grassland swamps. There are two species of hippopotamuses, the common river hippopotamus and the smaller pygmy hippopotamus.

Common river hippopotamuses are native to sub-Saharan Africa. They live in waterways like rivers, lakes, swamps, and estuaries. These semi-aquatic mammals can be found in various African countries, with populations in both East and West Africa.

Pygmy hippos, unlike their larger relatives, are found in the tropical rainforests and swamps of four West African countries: Côte d'Ivoire, Guinea, Liberia, and Sierra Leone. Their slightly smaller bodies have adapted to allow them to easily navigate the vegetation in rainforests.

Hippos must keep their skin wet with mud or water for most of the day to stay hydrated. While they don’t have sweat glands, they secrete a red substance called blood sweat. This helps protect their reddish-brown, thick yet sensitive skin from sunburn and keeps it moisturised. Despite their need to spend most of their time in the water, hippos can’t swim. Instead, they run or walk along riverbeds. When they’re rafting—napping while submerged in water—a subconscious reflex keeps them near the water’s surface.

They are formidable creatures and considered the second largest land mammal, smaller only than elephants. The average male hippo can weigh around 3,200 kilos (7,000 pounds, they’re typically around 3.5 metres (11 feet) long and 1.5 metres tall (5 feet).

While adult pygmy hippos stand about 75–100 cm (2.46–3.28 ft) high at the shoulder, are 150–175 cm (4.92–5.74 ft) in length and weigh 180–275 kg (397–606 lb). Their lifespan in captivity ranges from 30 to 55 years, though it is unlikely that they live this long in the wild.

 

Hippos have bulky, barrel-shaped bodies, short and stout legs, large heads, and enormously powerful jaws. Their jaws can open to 180 degrees and their bite is three times stronger than a lion. They have incredible sharp teeth that can grow up to 50cms long, which are used for eating and defence. The common hippopotamus has four webbed toes adapted to support them on land and in water. On the other hand, pygmy hippos tend to have less webbing and slightly longer legs. A hippo’s eyes and nostrils sit on top of its head, which helps it stay mostly submerged in water while breathing and keeping an eye on its surroundings. Although hippos can’t breathe underwater, they can hold their breath for up to five mins.

Hippos exhibit strong social bonds and typically live in groups of anywhere between 40 to 200, known as bloats, pods, or herds.

They are territorial creatures and use their dung to mark their territory. Male hippos have been known to flick their dung around to assert dominance. This dung is actually important to their aquatic ecosystems, as it transfers vital nutrients from land to water, allowing insects, plants, and other microorganisms to flourish. 

They play a crucial role in the ecosystem it inhabits in other ways, too. These herbivores graze on the vegetation surrounding wetlands, helping prevent overgrowth, which can clog water sources, disrupt the natural flow of water, and threaten the biodiversity of aquatic ecosystems. 

Healthy wetlands act as effective carbon sinks and remove excess carbon from the atmosphere. By maintaining the balance of these delicate ecosystems, hippos help mitigate the effects of climate change.

Hippos are facing several threats to their survival as a species. Global conservation efforts are critical to ensuring the well-being of the species and the ecosystems it inhabits.