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Endocrine patterns associated with reproduction in the Nile hippopotamus ( Hippopotamus amphibius) as assessed by fecal progestagen analysis". The dominant male reminds other hippos of his territory by flinging his dung as far as possible with his fan-shaped tail. Several lines of evidence, first from blood proteins, then from molecular systematics [13] and DNA [14] [15] and the fossil record, show their closest living relatives are cetaceans ( whales, dolphins, and porpoises). If you are a resident of another country or region, please select the appropriate version of Tripadvisor for your country or region in the drop-down menu.

Hippos rely on their flattened, horny lips to grasp and pull grasses which are then ground by the molars. The Ijaw people of the Niger Delta wore masks of aquatic animals like the hippo when practising their water spirit cults, [109] and hippo ivory was used in the divination rituals of the Yoruba. Groups of crocodiles have also been observed finishing off still-living male hippos that were previously injured in mating battles with other males.The goddess Tawaret is depicted as a pregnant woman with a hippo head, representing fierce maternal love. The film Hugo the Hippo is set in Tanzania and involves the title character trying to escape being slaughtered with the help of local children.

By 2005, the population in Virunga National Park had dropped to 800 or 900 from around 29,000 in the mid-1970s. kiboko – found in Kenya and Somalia; was noted to be smaller and more lightly coloured than other hippos with wider nostrils, somewhat longer snout and more rounded and relatively raised orbits with the space between them being incurved. Hippos don’t have true sweat glands, instead, they secrete “blood sweat,” which is a thick, red substance.Hippos will often raid farm crops if the opportunity arises, and humans may come into conflict with them on these occasions. Carbon stable isotopes suggest that hippopotamus-vectored nutrients subsidize aquatic consumers in an East African river". During the day, hippos remain cool by staying in water or mud, emerging at dusk to graze on grasses.

A rough evolutionary lineage of the hippo can thus be traced from Eocene and Oligocene species: from Anthracotherium and Elomeryx to the Miocene species Merycopotamus and Libycosaurus and finally the very latest anthracotheres in the Pliocene.Territorial bulls each preside over a stretch of water and a group of five to thirty cows and calves. In Egyptian mythology, the god Set takes the form of a red hippopotamus and fights Horus for control of the land, but is defeated. More DNA support for a Cetacea/Hippopotamidae clade: the blood-clotting protein gene gamma-fibrinogen". The most common hippo vocalisation is the "wheeze honk", which can travel over long distances in air. The Fossil Record of Continental Hippopotamids (Mammalia: Artiodactyla: Hippopotamidae) in Greece", Fossil Vertebrates of Greece Vol.