The hippopotamus is the third-largest type of land mammal and is the heaviest extant land artiodactyl. Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the Hippopotamidae are cetaceans whales, dolphins, porpoises, etc., from which they diverged about 55 million years ago. Hippos are recognisable by their barrel-shaped torsos, wide-opening mouths revealing large canine tusks, nearly hairless bodies, columnar legs and large size; adults average 1,500 kg 3,310 lb for bulls and 1,300 kg 2,870 lb for cows. Despite its stocky shape and short legs, it is capable of running 30 km/h 19 mph over short distances.
圖片編號:
242065671
拍攝者:
Debchephotography
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標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 599 px | JPG | 15 點 |
標準授權 | 2001 x 1499 px | JPG | 18 點 |
標準授權 | 2930 x 2195 px | JPG | 20 點 |
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進階授權 | 4002 x 2998 px | JPG | 88 點 |
進階授權 | 4002 x 2998 px | JPG | 88 點 |
進階授權 | 4002 x 2998 px | JPG | 88 點 |