The next is the hippo. Hippos are incredibly dangerous animals, they're tough and have a short temper. They kill more people every year than crocodiles and alligators put together!
While they're unfriendly to almost all animals and humans, they do have at least one friend- small birds that spend the day picking them clean of insects. This is good for both the hippo and the bird- the hippo can't reach to clean its own ears, and the bird gets to eat its catch.