
This is Likweli – photo by Bravo Bofenda.
In our forest-rarified Swahili of Congo-Kinshasa, “ni kweli?” means “is it true?”
“Likweli” is the kilanga name of a newly discovered Monkey (above) in Congo’s Lomami National Park. Discoveries of new populations of primates that are scientifically unknown have become exceedingly uncommon. Less than 15 years ago another new monkey species was discovered in Congo and it ALSO is from the forests along the Lomami River. So, this is doubly surprising! Two new monkey species in Congo? And both from the Lomami watershed? Ni kweli?? Not likely!

Likweli calling. Photo by Bernard Bonanga.
Along the Lomami River, Likweli is only in the forests on its right bank and only in the closed tropical forests on dissected clay plateaus. This primate is not only new to science, but new to many of the closest villagers! That is how rare it is. It appeared for the first time in modern scientific literature, PLOS One (on the 15th of July 2026 ) with the proposed IUCN Red List designation, “Endangered.”

There is an important difference between the discovery of Lesula and Likweli. Lesula was first seen on the left bank of the Lomami in 2007 when the Lukuru Foundation’s TL2 project started exploration of the forest of the Middle Lomami and adjacent Tshuapa and Lualaba basins.
International primatologists were sent the photos, but did not recognize the monkey. We went on high-alert; soon the field crews began seeing Lesula carcasses in hunters’ bushmeat hauls, they began seeing the monkey on forest patrols; it was even caught on camera trap photos. Lesula was introduced and named Cercopithecus lomamiensis in scientific literature in 2012.

JP Kapale collecting newly fallen urine underneath Likweli.
Similarly, in 2008, on the other side, the right bank of the Lomami River, an unknown monkey was seen by a Lukuru-TL2 team. They managed only to get a poor photo of part of the monkey. Only the back and part of the tail were visible. It was an all-black monkey, but did not seem to be the black crested mangabey known to be in the area.
Field teams were on high alert. But there were no more sightings.
Ni kweli? Why no more sightings? One reason: this area was so remote that it did not get good coverage by the Lukuru monitoring teams. Our coverage improved throughout what would become the Lomami National Park area as we put in permanent posts around the forest, further and further from the larger towns. The Lukuru-TL2 project put in 4 monitoring posts in the south and two in the north before, finally, in 2017, a post was established at Kakongo, on the west side of Lomami River in an area called Les Courbures named for a series of large meanders where the Lomami River cuts its way through a range of low clay hills. This was near the area where the mysterious monkey sighting had been made nearly a decade earlier.
We kept a stock of rations at Kakongo for long field circuits. We hired locally, and had permanent communication with near-by villages. In 2018 more thorough monitoring patrols were underway throughout the Courbure Sector.

Jean Pierre Kapale, a field leader from the local Langa ethnic group, took this photo in 2018.
Jean Pierre Kapale, operating from the Kakongo station, took photos of a monkey he was not familiar with in 2018. Soon he had convinced John Hart, TL2’s scientific director, that this was probably a new species and the same mystery monkey seen in 2008. The photos were poor resolution, but showed a monkey with unmistakable pinkish orange facial markings not known in any other species. Its thumbless hands seen in other photos indicated it was in the Colobinae sub-famiily. John sent Kapale’s best photos to renown primatologists around the world. They caused a stir.
Jonathan Kingdon did not hesitate and was unequivocal:
“Bravo, Bravo, congratulations on finding what I will stick my neck out and declare to be what I call an “Ecological Elder”, others might call it a living fossil.”
John Oates was no less excited:
“Relictual for Africa, and therefore not so distant from Asian colobines. This is what I was hinting at in my last mail, without being quite as bold as Jonathan in saying so outright. Thank you, Jonathan, for sticking your neck out.”
To make the case that Likweli was really a new species, we needed genetic information, morphological and vocalization studies. We were joined by some of the same scientists that made the case for Lesula. Fortunately, park guards confiscated three illegal kills from local hunters that provided the type specimens for the description of the species. (The Lomami National Park was created in 2016, and park guards were stationed at the posts, including Kakongo.)
The Morphological Team (Yale and Hunter College, CUNY) described Likweli’s distinguishing features. It was definitely a Colobus but the smallest species of the genus. The orange-cream color surrounding the mouth and under the nostrils as well as the large white patch under the tail, between the callosities, are found in no other Colobus species. (Much more detail in the paper )
The Genetics and Vocalizations Teams (Florida Atlantic University) showed genetic differentiation and vocal affinities. The split between Likweli and its “sister species”, the all black Colobus satanas of west Central Africa and Bioko Isand is estimated at 5 million years ago, making it the oldest divergence within the subfamily Colobinae (Much more detail in the paper).
The nearest population of Colobus satanas is more than 1.200 km away from Likweli, and Likweli has the smallest range of all the Colobus.
Even within its small range, as compared to other Colobus monkeys, Likweli is rarely encountered.
So it is true, ni kweli, this is a new species and a rare species.
As Jonathan Kingdon noted via email in 2019, “I think it possible that y’all have the relict of an ancient, multi-ancestral, relictual population of colobines. “
The genetic and morphological studies support his supposition.
The scientific name for Likweli is Colobus congoensis. The Likweli lives along Lomami’s banks like the other new monkey, Lesula. These forests are a deep green area on Google Earth and 20 years ago were unexplored. There are still other little-known forests like this in DR Congo and more work to do!

Illustration of the Likweli by Kimio Honda.














































