When biologists discover a new species in the 21st century, it's usually because they've run new DNA analysis, peered more closely down the microscope, or collected specimens from far beyond the human comfort zone.

New, Orange-Lipped Monkey Discovered in Africa: It’s one of only a handful of new monkey species identified on the continent in the last 75 years

In 2008, wildlife researchers surveying a massive, underexplored forested region in the Democratic Republic of Congo photographed a black monkey. That region eventually became…