THE CRISIS
Every Colobus species is under threat.
Red, olive, and black-and-white colobus monkeys are quietly disappearing across Africa. As Africa’s most threatened group of primates, their habitat is shrinking, hunting pressures are mounting, and several species may vanish before the world even notices.
BY THE NUMBERS
The crisis isn’t coming. It’s already here.
76%
Threatened Taxa: Of all Red Colobus taxa facing active extinction risk.
89%
Habitat Loss: Of known range sites experiencing severe human encroachment.
63%
Endangered Status: Of all Colobus species classified as endangered or worse.
50%
Population Loss: Average decline across priority species in a single generation.
WHY COLOBUS MATTERWHY COLOBUS MATTER
Colobus are the clue.
Colobus monkeys are living ecological indicators. Because they depend on canopy forests and complex foliage, they are the first primates to react when an ecosystem collapses.
Their presence marks a healthy, functioning forest; their absence tells a story of severe environmental strain. When colobus populations drop, it signals that an entire ecosystem is failing—long before the damage becomes visible from the outside.
THE THREATS
No single threat. No simple solution.
Human pressure on Africa’s forests is reshaping the landscapes colobus depend on. Together, three compounding forces are driving these species closer to extinction.
Colobus Range
High Forest Loss & Fragmentation
HABITAT FRAGMENTATION & LOSS
Logging, agriculture, and infrastructure divide continuous canopy corridors. Because colobus rarely travel across open ground, fragmented forests isolate groups and eliminate access to food.
HUNTING & BUSHMEAT TRADE
Commercial and subsistence hunting target colobus across their entire range. Their large group sizes, predictable habits, and loud territorial calls make them particularly easy targets.
AGRICULTURAL & HUMAN ENCROACHMENT
Rapid land conversion reduces forest cover to micro-pockets. As human populations expand, remaining colobus populations are squeezed into isolated areas unable to support long-term survival.
SPECIES AT RISK
The front lines of extinction.
While all colobus face mounting pressure, these species are currently facing immediate risk of localized or total extinction.
Niger Delta Red Colobus
CRITICALLY ENDANGERED
Pushed into marsh forest pockets in Nigeria; threatened by habitat conversion and hunting. Fewer than a few hundred individuals remain.
Tana river red colobus
CRITICALLY ENDANGERED
Restricted to small, fragmented gallery forest patches along Kenya’s Tana River, severely isolated by land clearing.
PENNANT’s Red Colobus
CRITICALLY ENDANGERED
Endemic to Bioko Island, this species has lost nearly half its population in 20 years to relentless commercial hunting and habitat destruction.
WHY NOW?
Because time is the one thing they can’t outrun.
Viable populations exist, and the pathways to recovery are known. What separates this moment from the past isn't science or awareness; it’s that delay will soon make effort irrelevant. Protecting colobus today is the difference between stabilizing a species and documenting its loss.
Changing the course for Colobus takes all of us.
Whether you represent an accredited zoo, lead field conservation, educate the public, or support from afar, your involvement directly powers species survival. Discover how you can strengthen frontline defense for West Africa's most vulnerable primates.
GET INVOLVED