Anup Shah / Tana mangabey (Cercocebus galeritus) mother grooms her baby of between -3 months old watched by a juvenile. Tana River Forest, South eastern Kenya.

Fiona Rogers / Tana mangabey (Cercocebus galeritus) female grooming a juvenile. Tana River Forest, South eastern Kenya.

Fiona Rogers / Tana mangabey (Cercocebus galeritus) adult and juvenile sitting - portrait. Tana River Forest, South eastern Kenya.

Fiona Rogers / Tana mangabey (Cercocebus galeritus) babies sitting together - portrait. Tana River Forest, South eastern Kenya.

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) mother and five month old young, Tana River Primate Reserve, Kenya

Anup Shah / Crested Mangabey (Cercocebus galeritus) juvenile on fallen tree, Tana River Primate Reserve, Kenya

Tom Struhsaker / Sanje Mangabey Monkey (Cercocebus galeritus sanjei) selecting leaves to feed on. Mizimu area, Sonjo Valley, Udzungwa Mountains National Park, Tanzania. Endangered species

Anup Shah / Tana mangabey (Cercocebus galeritus) babies playing in a tree. Tana River Forest, South eastern Kenya.

Anup Shah / Tana mangabey (Cercocebus galeritus) juvenile male being groomed. Tana River Forest, South eastern Kenya.

Anup Shah / Tana mangabey (Cercocebus galeritus) eating the fruit of the Borassus aethiopum tree. Tana River Forest, South eastern Kenya.

Anup Shah / Tana mangabey (Cercocebus galeritus) juveniles resting on a branch. Tana River Forest, South eastern Kenya.

Anup Shah / Tana mangabey (Cercocebus galeritus) baby -3 months old plays alone in a tree while others groom. Tana River Forest, South eastern Kenya.