WWF (World Wide Fund for Nature) is one of the world’s largest conservation NGOs (non-governmental organization). It was established in Switzerland in 1961 with a purpose to protect endangered wildlife. Since then WWF has gradually expanded the activities to cover wider range of biodiversity conservation -- from forest or coral reef ecosystems to climate change. Having WWF International, its secretariat, in Switzerland and offices in over 50 nations, WWF operates globally in over 100 nations.