Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) in tree, Jozany Forest, Zanzibar, Tanzania. Highly endangered. Did you know? Zanzibar red colobuses are called 'Poison monkeys' by the local people on the is...

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) by stripped tree bark she is feeding on. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) medium sized juvenile stripping and feeding on bark of bottle brush (Callistemon citrinus). Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) head portrait, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) jumping through the air, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) relaxing on tree branch, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) juvenile, sitting in tree calling, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) mother with offspring, sitting in tree, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Bernard Castelein / Zanzibar Red Colobus (Procolobus kirkii) head portrait of infact, sitting with mother, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Suzi Eszterhas / Black and White Colobus Monkey (Colobus guereza) mother with infant (less than one week old) Kibale Forest National Park, Uganda

Suzi Eszterhas / Black and White Colobus monkey (Colobus guereza) mother with infant (less than one week old) sitting on tree branch, Kibale Forest National Park, Uganda

Pete Oxford / Kirk's red colobus (Procolobus kirkii) Jozani Forest Reserve, Zanzibar, Tanzania

Pete Oxford / Kirk's red colobus (Procolobus kirkii) in tree feeding, Jozani Forest Reserve, Zanzibar, Tanzania

Anup Shah / Eastern Black and white colobus monkey holding baby {Colobus guereza} in tree Kenya

Anup Shah / Zanzibar red colobus monkey (Procolobus kirkii) mother with young, Zanzibar, Tanzania, East Africa

Anup Shah / Eastern Black and white colobus monkeys fighting, Kenya, East Africa

Anup Shah / Zanzibar red colobus portrait (Procolobus kirkii) Jozani forest, Zanzibar, Tanzania

Anup Shah / Zanzibar red colobus monkey (Procolobus kirkii) sheltering under leaf, Jozani forest, Zanzibar, Tanzania

Anup Shah / Zanzibar red colobus monkey (Procolobus kirkii) with young, Jozani forest, Zanzibar, Tanzania

Anup Shah / Male Chimpanzee 'Sheldon' knuckle walking carrying dead Red colobus monkey in jaws {Pan troglodytes schweinfurtheii}, 19-years-old, high ranking male of Kasekela community, Gombe NP, Tanzania. 2002

Peter Blackwell / Black and white colobus monkey holding white baby {Colobus guereza} in tree, Mount Kenya East Africa

Jabruson / Black and white colobus (Colobus guereza) visiting rainforest clearing. Like many forest species, these primates visit these forest clearings in order to partake of minerals exposed by elephants excav...

Jabruson / Black and white colobus (Colobus guereza) visiting rainforest clearing. Like many forest species, these primates visit these forest clearings in order to partake of minerals exposed by elephants excav...

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) feeding in tree, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) young playing in tree, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) mother and young, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) adult feeding in tree, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / A sign for the Colbus Cafe in the Jozany Forest . Zanzibar red colobus (Piliocolobus kirkii), Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) mother and young, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) mother and young, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) mother and young in tree , Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) mother and young, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus portrait (Piliocolobus kirkii), Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) two colobus crossing the road that bisects the forest Jozany, with sign that warns of the danger of collision with the colobus, Jozany Forest, Zanzibar. Hig...

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) portrait, Jozany Forest, Zanzibar, Tanzania. Highly endangered

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) female with young, Jozany Forest, Zanzibar, Tanzania. Highly endangered (IUCN), in 1981 the total population was estimated at 1500 animals in Zanzibar island...

Enrique Lopez-Tapia / Zanzibar red colobus (Piliocolobus kirkii) female with young, Jozany Forest, Zanzibar, Tanzania. Highly endangered (IUCN), in 1981 the total population was estimated at 1500 animals in Zanzibar island...

Suzi Eszterhas / Chimpanzee (Pan troglodytes) feeding on Ugandan Red Colobus (Procolobus tephrosceles) monkey, western Uganda

Suzi Eszterhas / Chimpanzee (Pan troglodytes) pair feeding on Ugandan Red Colobus (Procolobus tephrosceles) monkey, western Uganda

Suzi Eszterhas / Chimpanzee (Pan troglodytes) feeding on Ugandan Red Colobus (Procolobus tephrosceles) monkey, western Uganda

Konrad Wothe / Angolan Colobus (Colobus angolensis) eating flowers, Kenya

Roland Seitre / Peter's Angolan Colobus Monkey (Colobus angolensis palliatus) in tree, Ukunda, Kenya.

Roland Seitre / Portrait of Peter's Angolan Colobus Monkey (Colobus angolensis palliatus) with closed eyes. Ukunda, Kenya.

Roland Seitre / Portrait of Peter's Angolan Colobus Monkey (Colobus angolensis palliatus). Ukunda, Kenya.

Roland Seitre / Welcome sign at Diani Beach, illustrated with painting of a Colobus Monkey. Ukunda, Kenya.

Roland Seitre / Colobus Trust, Primate Conservation Research and Rescue centre, man standing under model of monkey tree bridge, constructed to allow monkeys to cross roads safely. Ukunda, Kenya, Africa.

Roland Seitre / Primate Conservation Research and Rescue rangers taking a monkey cage from the back of their vehicle. Ukunda, Diani Beach, Kenya.

Roland Seitre / Primate Conservation Research and Rescue ranger under a completed monkey bridge, so Colobus Monkeys can cross the road safely. Ukunda, Diani Beach, Kenya.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) in tree. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) climbing along beach fence. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) on coast, Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) mother and baby in branches. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) perched on thin branches. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) picking leaves. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) baby playing with mother in canopy. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) portrait among branches. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) opening seed case with its teeth. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) eating hibiscus flower. Kenya, Africa.

Roland Seitre / Peter's Angola Colobus Monkey (Colobus angolensis palliatus) among hibiscus flowers with pollen on its face. Kenya, Africa.

Konrad Wothe / Black and White Colobus monkey (Colobus guereza) leaping from tree to tree, Arusha National Park, Tanzania, East Africa

Konrad Wothe / Black and White Colobus monkeys (Colobus guereza) Arusha National Park, Tanzania, East Africa

Konrad Wothe / Black and White Colobus monkey (Colobus guereza) with baby in tree, Arusha National Park, Tanzania, East Africa

Tom Struhsaker / Udzungwa red colobus monkey (Procolobus gordonorum) adult male, Udzungwa Mts. NP, Tanzania, July, endangered species

Konrad Wothe / Mantled Colobus (Colobus guereza), Arusha National Park, Tanzania

Tom Struhsaker / Adult female Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) on a trunk she is stripping of bark to feed on. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) mother and baby with troupe in background. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) old adult female on ground. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) medium sized juvenile stripping and feeding on bark of bottle brush (Callistemon citrinus). Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) medium sized juvenile eating bark of bottle brush (Callistemon citrinus). Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) feeding on bark of Eucalyptus (probably grandis). Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) resting between trees. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) adult male picking and eating leaves from canopy. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) adult female in canopy. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Uganda Red Colobus Monkey (Procolobus rufomitratus tephrosceles) adult / subadult female. Kanyawara, Kibale National Park, Uganda.

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) medium-sized juvenile female among canopy leaves. Udzungwa Mountains National Park, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) medium-sized juvenile female sitting in canopy. Udzungwa Mountains National Park, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female (top) with two juveniles, feeding on leaves. Udzungwa Mts National Park, Tanzania headquarters near Mang'ula. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) sub-adult male feeding. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park, Tanzania. Endangered species

Tom Struhsaker / Sanje Mangabey Monkey (Cercocebus galeritus sanjei). adult female grooming tail of another female, with baby at her feet. Mizimu area, Sonjo Valley, Udzungwa Mountains National Park, Tanzania. Endange...

Stephen Dalton / Temmincks red colobus monkey (Procolobus badius temminckii) sitting in tree, The Gambia, West Africa. Endangered

Anup Shah / Zanzibar Red Colobus (Procolobus kirkii) infant swinging from branch, Jozani Forest, Zanzibar, Tanzania NOT FOR STOCK SALE, PLEASE CHECK WITH TIM A BEFORE SENDING TO CLIENTS

Robin Chittenden / Portrait of a Western Red Colobus Monkey (Procolobus badius) Gambia, West Africa, January.

Robin Chittenden / Portrait of a Western Red Colobus Monkey (Procolobus badius). Gambia, West Africa, January.

Florian Möllers / Three Black and white colobus monkeys / Guerezas (Colobus guereza) on the roof of a house of the abandoned Budongo Sawmill. Budongo Forest Reserve, Masindi, Uganda, Africa, Decmember

Florian Möllers / Male Guereza / Black-and-white Colobus (Colobus guereza) feeding in Paper Mulberry (Broussonetia papyrifera). Budongo Forest Reserve, Masindi, Uganda, Africa. december

Florian Möllers / Three Black and White colobus monkeys / Guerezas (Colobus guereza) sitting in the entrance of a wooden building of the deserted Budongo Sawmill, Budongo Forest Reserve, Masindi, Uganda, Africa, Decemb...

Tui De Roy / Mantled Colobus (Colobus guereza) in tree, Nanyuki, Kenya

Tui De Roy / Mantled Colobus (Colobus guereza), Nanyuki, Kenya

Tui De Roy / Mantled Colobus (Colobus guereza), Nanyuki, Kenya

Mark Carwardine / Black and white colobus monkey (Colobus guereza) in tree, Queen Elizabeth National Park, Uganda, Africa, October