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As herbivores, hippos peacefully graze throughout the night, eating grasses and aquatic plants. However, they won’t hesitate to attack anything that threatens their space, food, or young.
Hippos spend most of the day in water to stay cool and hydrated. Just before night begins, they leave the water to forage on land. A hippo will travel 3–5 km (1.9–3.1 mi) per night, eating around 40 kg (88 lb) of grass. By dawn, they are back in the water. [36]
The hippos split off from the anthracotheres some time during the Miocene. The oldest records of Hippopotamidae are from Afro-Arabia and date to the late Miocene, approximately 7.4 million years ago, expanding into Eurasia around 6 million years ago. [2]
Giraffes and elephants mate for a relatively short time, while rhinos and hippos have a mating session lasting an extended period of time. Females have long gestation periods, between 8 and 22 months. Intervals between births vary between species, but the overall range is 1.3 to 4.5 years. [38]: 116–124
Hippopotamus amphibius was widespread in North Africa and Europe during the Eemian [40] and late Pleistocene until about 30,000 years ago. Archaeological evidence exists of its presence in the Levant, dating to less than 3,000 years ago. [41] [42] The species was common in Egypt's Nile region during antiquity, but has since been extirpated.
Poppy, a pygmy hippo, was born at Metro Richmond Zoo in Virginia on Dec. 9. Her name was selected by online voters. Popular baby pygmy hippo born in the US now has a name after poll drives 100,000 ...
At birth, pygmy hippos weigh 4.5–6.2 kg (9.9–13.7 lb) with males weighing about 0.25 kg (0.55 lb) more than females. Pygmy hippos are fully weaned between six and eight months of age; before weaning they do not accompany their mother when she leaves the water to forage, but instead hide in the water by themselves. The mother returns to the ...
A female pygmy hippopotamus calf was born at the Metro Richmond Zoo in early December, marking the third calf of the endangered species to be born at the zoo in the last five years, officials said.