Genetic analyses confirmed that C. congoensis is part of the genus Colobus, but findings also revealed an unexpected evolutionary connection. This robust pool of information allowed us to pretty quickly and conclusively confirm C. congoensis as a new species.” It has a deep roaring call which has a distinct acoustic structure compared to other Colobus species. It seemed that C. congoensis is isolated by rivers and forest barriers and dependent on upland forest patches in the Congo Basin. The scientists propose that C. congoensis be classified as Endangered, making protection of this species and the region it lives in critical.