One of the four most terrifying creatures in the world, sloths resemble the folk name of water monkeys, two piranhas, which are notorious carnivorous metabolites in South America, not large but fierce, and the longest and most frequent

One of the four most terrifying creatures in the world, the sloth is like a popular folk water monkey, the second piranha, it is the notorious carnivorous metabolism of South America, not big but fierce, the longest often rush attack, the animals that fall into the water include people, in a short period of time can eat only bones, three face fish, obviously a fish, but grew a human face, four owls, its call is very desolate, its neck can also rotate 270 degrees, and even once was called a mourning bird. So the question is, does anyone know the secret behind this?