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The Sumatran Tigers were being almost extinct because of the people hunting these animals for their skin and bones.
In "Mission in the Jungle", the poachers were turned into some aggressive creatures due to Wild Magic. They tried to kill the Sumatran tigers' cubs but the Winx were just in time to save them. Stella used her special Butterflix Power to remove the sorcery from the place and she saved everyone. Later, the Winx started campaign and advertisements to stop people from hunting innocent animals. Meanwhile, Roxy opened an Animal Rescue Park for the endangered animals on Earth.