BBC Nature - African elephants prefer Serengeti National Park, Feb 06, 2013

"Wild African elephants prefer to live in safer, protected areas and become stressed when they leave them.
Scientists have found African elephants living outside Serengeti National Park are more stressed than those within the protected area.
More elephants also choose to live inside the park, suggesting they "know" which areas are safer to live in, and actively avoid humans.
Details are published in the African Journal of Ecology.
Serengeti National Park helps protect animals from threats such as illegal hunting and habitat disturbance."

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