Poaching leads to nearly 80% of Sumatran tiger deaths, and there is no proof that poaching has gone down much in the past two decades, according to the WWF.

Deforestation also triggeres a deadly cycle — as habitats are destroyed by human activity, tigers look for food elsewhere and are more likely to run into humans as they move away. They may attack livestock or harm people, and villagers in turn kill more tigers in retaliation.