Scientists Identify Striking New Monkey Species in Congo's Rainforests

An international research team has formally described Colobus congoensis, a previously unknown monkey species inhabiting the rainforests of the Democratic Republic of Congo. The small black primate, known locally as "Likweli," displays striking orange-cream patches around its mouth and nose and represents only the fifth new African monkey species discovered in the past 75 years. The findings were published in the journal PLOS ONE and were supported by evidence from physical anatomy, genetic analysis, and field observations.

Discovery and Identification

The identification process began in 2008 when researchers photographed an unusual monkey in east-central Congo. A decade of careful study followed, including 114 confirmed sightings between 2018 and 2022. Scientists examined museum specimens, skeletal anatomy, dental characteristics, and genetic data to confirm that Likweli represented a distinct species separate from all other known African colobus monkeys.

The species weighs approximately 15 pounds and possesses a glossy black coat with light-reflecting fur and dramatic facial features created by long black facial hairs and large folded ears. Researchers noted that its closest genetic relative, Colobus satanas, inhabits west-central Africa more than 1,200 kilometers away. Genetic evidence indicates the two species diverged roughly 4 to 5 million years ago, marking one of the oldest known evolutionary splits within the Colobus lineage.

Research and Conservation Significance

The discovery involved collaboration between international institutions including Florida Atlantic University, the City University of New York Graduate Center, Yale University, and the Lukuru Wildlife Research Foundation. All fieldwork was conducted under authorization from the Congolese Institute for Nature Conservation. The identification of Likweli highlights the importance of protecting Lomami National Park, an 8,874-square-kilometer reserve in the Congo Basin known for rare and endemic species. The park remains largely unexplored scientifically, suggesting additional undocumented wildlife may inhabit its canopy ecosystems.