1. Only two representatives of the hippopotamus family have survived to this day – the Nile and the Pygmy Hippopotamus.
2. Hippos are active mainly at night. Hot days spend immersed in water.
3. Hippopotamus herds consist of 10 to even 40 females, which is proved by one male.
4. The female hippopotamus breeds in the water, one cub (twin pregnancy is very rare), which later feeds for a year, also without leaving the water.
5. From terrestrial mammals, from hippos only elephants are bigger.
6. Hippos are the most closely related to whales.
7. Hippopotamus skin is 4 cm thick.
8. This skin is extremely heavy. It is 1/4 of the total weight of a hippopotamus.
9. The oldest hippopotamus in captivity was 56 years old.
10. Hippopotamus can hold air under water for up to 6 minutes.
11. Sexually, females reach about 7 years of age, and males reach 5 years.
12. The young hippopotamus, after birth, is about 120 cm long and weighs over 30 kg.
13. The length of hippopotamus teeth is up to 30 cm.
14. The hippopotamus in Greek means “river horse”.
15. Despite their poor appearance, hippos are one of the most dangerous animals in the world.
16. In the wild, about 150,000 hippopotamuses live.
17. Hippos pee back and scatter their tail.
18. A shaved guinea pig looks like a little hippopotamus.
19. Hippopotamus in deep water usually falls to the bottom, which goes.
20. It is estimated that hippos kill over 2,800 people annually.
21. The largest groups of hippos can count up to 150 individuals.
22. Hippopotamus teeth grow all life.
23. Small hippos are born under water.
24. They are breastfed for up to one and a half years.
25. Grass is the favorite food.
26. Eyes of hippos have a transparent membrane, so they can swim with open eyelids without any problem.
27. Hippopotamus for supper can eat over 35 kg of plants.
28. Hippopotamus exhibits only eyes in the water. Their jaws can sense even the smallest movement, thanks to which they know what is going on underwater.
29. Under the water, hippos make similar sounds to whales.