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

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

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) juvenile grooming female, Tana River Primate Reserve, Kenya

Fiona Rogers / African Elephant (Loxodonta africana) pair in river, Tana River, Tana River Primate Reserve, Kenya

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) feeding on East African Doum Palm (Hyphaene compressa) nut, Tana River Primate Reserve, Kenya

Fiona Rogers / Crested Mangabey (Cercocebus galeritus), Tana River Primate Reserve, Kenya

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) juvenile, Tana River Primate Reserve, Kenya

Fiona Rogers / African Elephant (Loxodonta africana) pair drinking in river, Tana River, Tana River Primate Reserve, Kenya

Fiona Rogers / African Elephant (Loxodonta africana) pair entering forest, Tana River Primate Reserve, Kenya

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) sub-adult male yawning while being groomed, Tana River Primate Reserve, Kenya

Fiona Rogers / Crested Mangabey (Cercocebus galeritus) juvenile male feeding, Tana River Primate Reserve, Kenya