Which wildlife conservation organization's animal mascot has been in use the longest as its official logo/symbol?

Conservation organizations often use animal mascots to represent their brand and mission. These mascots become powerful symbols that raise awareness for wildlife protection efforts worldwide. Test your knowledge about these famous wildlife brand mascots that have helped shape public perception and drive conservation efforts. Can you identify which famous mascot has been representing its organization the longest?

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The World Wildlife Fund's Giant Panda (established 1961)
The National Wildlife Federation's Ranger Rick Raccoon (established 1968)
The Wildlife Conservation Society's Snow Leopard (established 1971)
Defenders of Wildlife's Wolf (established 1965)