New Species of Monkey Found in DR Congo Shows How Much There’s Left to Discover

Colobus congoensis – credit, released by Daniel Rosengren, Frankfurt Zoological Society

When news reaches the public that a new species has been identified, the chances really are 9 times out of 10 that it’s some deep sea slug or a spider.

From the Congo comes the story of the exception—a new species of colobus monkey has been identified, becoming just the 5th such occasion in 75 years of research on the Colorful Continent.

A pair of Colobus congoensis – credit, released by Daniel Rosengren, Frankfurt Zoological Society

The creature with black fur and an innocent face, also bears a striking set of orange lips.

Named Colobus congoensis and known locally as “Likweli” in its home of Lomami National Park, the monkey had lain hidden from our sight within this remote region of the Congo Basin despite decades of scientific exploration in Central Africa.

The mystery of this new species began with an unexpected sighting in 2008, when researchers captured a partially obscured photograph of the monkey. A decade later, researchers encountered the animal again and obtained a much clearer image. That discovery sparked further investigation into the elusive primate.

Now, new genetic, anatomical, and acoustic analyses have confirmed that the monkey represents a distinct evolutionary lineage that diverged from its closest known relative, the black colobus monkey, 4 to 5 million years ago

“This discovery is both exciting and deeply personal, highlighting the extraordinary biodiversity of my homeland and how much remains undocumented,” said Junior Amboko, a Congolese scientist and co-corresponding author of the findings in a statement.

Smaller than related colobus monkeys—about 15 pounds—it is distinguished by sleek, light-reflecting fur and dramatic facial features created by long black facial hairs and large folded ears. White perianal markings further distinguish this species.

In a separate response to the BBC, Amboko said that the animal had a small range compared to other colobus monkeys, suggesting it could be already Endangered. In the statement, it’s detailed that between 2018 and 2022, researchers recorded 114 sightings across an estimated range of around 900 square miles.

“As part of our search, we interviewed people in 52 villages close to where the animals live. And only people in 8 villages [had ever seen] them.”While the scientists’ official recommendation in their paper describing the monkey is that it should be listed as Endangered, the locals also told them that the monkey was a target of local indigenous hunters. New Species of Monkey Found in DR Congo Shows How Much There’s Left to Discover

Read More........→July 29, 2026

Nest‑building chimpanzees seem to anticipate future weather

Fabiana Rizzi / Unsplash Hassan Al Razi, The University of Western Australia

Every evening, as they move from place to place through the forest, chimpanzees stop to build a nest – most often in a tree – to sleep in. Using a selection of branches, leaves and twigs, they create comfortable and safe spaces to get some shuteye.

Like human beds, these are places to rest – but they also help chimps stay warm or cool and protect themselves against the weather. As you might expect, how and where chimpanzees build their nests depends on things like temperature, humidity, wind and rainfall.

But how do they make these choices? Previous research has shown the construction is related to the conditions at the time when the creatures are building the nest.

In new research, published today in Current Biology, my colleagues and I show that chimps are a little bit cleverer than you might expect: they seem to build their nests in ways that anticipate what the overnight weather will be.

A year in Rwanda

We conducted a field study on eastern chimpanzees in Nyungwe National Park, Rwanda, a cool and humid mountain forest. Over a 12-month period, we collected detailed data on the structure of nests, the characteristics of their chosen sites, and the kinds of trees the chimps chose.

We also measured how well different kinds of nests insulate against cold and heat. At the same time, we made detailed records of weather conditions when the nests were being built and throughout the night.

This let us test whether chimpanzees respond primarily to immediate environmental conditions, or whether their nesting decisions are better explained by the conditions they experience later during the night.

Chimpanzees are always adjusting their behaviour

Our results show chimpanzees consistently adjust their nesting behaviour in relation to environmental conditions. They preferred to build nests in places that were warmer, more humid and less exposed to wind than surrounding areas.

Nest structure and insulation varied systematically with environmental conditions. In cooler and wetter conditions, nests were thicker and deeper – indicating the chimpanzees put more effort into insulation when conditions are tougher.

We also found that factors such as the width and depth of the nest influenced its insulating ability.

The chimpanzees tended to build more insulating nests when weather was colder and when it was more humid, both during nest-building and overnight.

In cooler and wetter conditions, the chimps also built their nests higher, in taller trees with denser leaf cover. This makes sense: it would be a more stable microclimate with more shelter from rain.

Are chimps thinking ahead?

Importantly, nesting decisions aligned more closely with overnight environmental conditions than with those at the time of construction. When we took overnight weather into account, we found we could explain the variation in nesting behaviour much better than if we used only the current conditions.

One possible explanation is that chimpanzees use environmental cues, such as shifts in temperature, humidity or atmospheric pressure, that are linked to upcoming weather.

These cues may allow them to adjust nest-building behaviour in advance. Does this mean they predict or forecast future weather? Not quite.

But it does show their behaviour is consistent with reacting to environmental signals that are associated with later conditions. Either way, the chimps display a remarkable sensitivity to their environment – and a grasp of how to live in it.

Hassan Al Razi, PhD Student, School of Human Sciences, The University of Western Australia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More........→May 01, 2026