Both human and natural factors seriously contribute to the disappearance of most of animals today. The majority of people currently have a tendency to hunt rare animals illegally. After a successful hunting, they will divide the animals’ body into many separate parts such as heads, horns, tusks, skins, bones and sell them to other people to earn money. Because everyone usually believes in nonsense and unreliable rumors spreading from individuals or organizations who are not really experts about biology, they imitate those undependable informations in using animals for a certain purpose. For example, people frequently use Rhino horns and Tiger bones as a treatment or a medicine. Besides, other parts of those animals are used in decoration and jewelry or packaged as souvenirs.