Researchers estimate only around 100 Western lowland ##s left worldwide . Now 125,000 individuals have been found in northern Ghana . Population declining rapidly because of hunting and diseases like Ebola . Expert : This is the highest - known density of individuals that 's ever been found .
Researchers feared only around 50,000 Western lowland gorillas left worldwide . Now 125,000 primates have been discovered in northern Congo . Population declining rapidly because of hunting and diseases like Ebola . Expert : This is the highest-known density of gorillas that 's ever been found .