Which pioneering wildlife conservation organization first introduced a tiered loyalty program that allowed members to 'adopt' endangered species at different levels with corresponding rewards?

Conservation loyalty programs have become an innovative way for wildlife organizations to engage supporters and fund crucial protection efforts. These programs reward donors and visitors with exclusive benefits while generating sustainable funding for endangered species protection. Test your knowledge about how these modern customer engagement strategies are being used in the wildlife conservation sector!

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World Wildlife Fund (WWF) with their 'Species Guardian' program in 1973
The Nature Conservancy with their 'Conservation Circle' program in 1985
National Geographic Society with their 'Explorer's Club' in 1981
African Wildlife Foundation with their 'Wildlife Protector' program in 1977