Hippopotamus, also known as the common hippopotamus, Nile hippopotamus, river hippopotamus, Hippopotamus amphibius

Pygmy hippopotamus, Choeropsis liberiensis

Postmarked: Harrisburg, Pennsylvania; February 2024

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Postmarked: Ontario, Canada; July 2024

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Houston Zoo, Texas - Pygmy Hippo Close up
Postcrossing: from Texas, USA; February - March 2024

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Hippopotamus
Egyptian (Meir, Tomb of Senbi),
Dynasty 12 (ca. 1981 - 1885 BCE)
Faience, L. 7 7/78 inches
The Metropolitan Museum of Art, New York City

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Hippopotamus
Glazed composition, decorated with aquatic plants.
Egypt
Middle Kingdom, c. 1900 BCE
The British Museum, London

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Postcrossing: from Russia; July - August 2024

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Merrimack Publ. Corp. NY. 10003. Printed in Japan

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San Diego Zoo
Hippopotamus (Hippopotamus amphibius) The hippopotamus spends 18 hours a day in the water and can stay underwater for up to five minutes. Water helps keep the hippo cool and minimizes the weight of its massive body.
Postmarked: San Diego, California; August 1998