Actually, many animals are disappearing in the world. We can count 47,677 species worldwide endangered. This represents a huge percentage! Precisely, extinction is on the order of 21% of mammals, 30% of amphibians, 12% of birds, 28% of reptiles, 37% of freshwater fish, 70% of plants and 35% of invertebrates. But for the time, there are already 875 species that have totally disappeared from the planet, at least in the wild. Could you imagine that one day, we will talk about elephant or tiger at the past to our children, showing them pictures ? We need to do something to solve this problem.