Which wildlife conservation organization introduced a brand mascot named 'Chi Chi' in 1961 that later became the iconic logo for the entire global organization?

In recent years, many nature and wildlife organizations have created memorable brand mascots to promote conservation efforts and eco-friendly products. These mascots often become the face of sustainability campaigns and help create emotional connections with environmentally-conscious consumers. Test your knowledge of these iconic green ambassadors that represent organizations dedicated to protecting our natural world!

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World Wildlife Fund (WWF)
The Nature Conservancy
National Wildlife Federation
Conservation International