African Elephants inhabit the African exhibit. Estimated population in the wild are 415,000, however they do have more habitats instead of one like most animals on the list.
Two polar bears inhabit the North American Rocky Coast exhibit. The population in the wild is estimated around 22,000-31,000.
The Bison are located in the North American exhibit. The population in the wild is around 20,504.
The Red wolves are located within the North American exhibit. Currently there are only 70 Red Wolves within the wild. The North Carolina Zoo has been lucky enough to foster pups born to wild mother wolves.
Why are animals added to the Endangered Species list?
The top reasons why most species are added to the list is because their habitat is being threatened either by man made or natural elements, human conflicts between the species, or illegal conflicts (poaching or trading.) There are a few exceptions to the rule. For example the Bison population rapidly decreased through physical deformities and genetically inherited diseases due to inbreeding.