sentences:  Tribal people are often falsely accused of contributing to the decline of species – in the case of India, for example, they bear the brunt of anti-tiger poaching measures, despite the main reason for the tiger population crash in the 20th century being due to hunting by European colonists and Indian elites.In fact, contrary to popular belief, there is strong evidence to show that they effectively regulate and manage animal populations.Interpol has estimated the extent of the illegal wildlife trade between $10 billion and $20 billion per year.