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Beginning in 1991, red wolves were also released into the Great Smoky Mountains National Park in eastern Tennessee.
However, due to exposure to environmental disease ( parvovirus ), parasites and competition, ( with coyotes as well as intraspecific aggression ), the red wolf was unable to successfully establish a wild population in the park.
Low prey density was also a problem, forcing the wolves to leave the park boundaries in pursuit of food in lower elevations.

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