Edwin Giesbers / Barbary macaque (Macaca sylvanus) profile, portrait, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) babies hand holding onto adults fur. Gibraltar Nature Reserve, Gibraltar

Edwin Giesbers / Barbary macaque (Macaca sylvanus) baring teeth as a sign of submission, Gibraltar Nature Reserve, Gibraltar,

Edwin Giesbers / Barbary macaque (Macaca sylvanus) youngster climbing, Gibraltar Nature Reserve, Gibraltar,

Edwin Giesbers / Barbary macaque (Macaca sylvanus) two sitting close together, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) baby sitting with mother, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) baby sitting with mother, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait, Gibraltar Nature Reserve, Gibraltar, June.

Mark MacEwen / Barbary macaque (Macaca sylvanus) baby holding on to mother. Gibraltar Nature Reserve, Gibraltar. August.

Mark MacEwen / Barbary macaque (Macaca sylvanus), two adults with baby, overlooking town and ships in sea at sunset. Gibraltar Nature Reserve, Gibraltar. August 2018.

Mark MacEwen / Barbary macaque (Macaca sylvanus) baby sheltering between arms of mother and another adult. Gibraltar Nature Reserve, Gibraltar. August.

Mark MacEwen / Barbary macaque (Macaca sylvanus) on The Rock at sunrise. Gibraltar Nature Reserve, Gibraltar. August.

Mark MacEwen / Barbary macaque (Macaca sylvanus) sitting on railing above town and sea at sunrise. Gibraltar Nature Reserve, Gibraltar. August.

Mark MacEwen / Barbary macaque (Macaca sylvanus), two sitting on The Rock at sunrise, Strait of Gibraltar in background. Gibraltar Nature Reserve, Gibraltar. July 2018.

Mark MacEwen / Barbary macaque (Macaca sylvanus), two sitting on The Rock at sunrise, Strait of Gibraltar in background. Gibraltar Nature Reserve, Gibraltar. July 2018.

Karine Aigner / Tourists feed Barbary macaques (Macaca sylvanus) at the edge of the forest on the roadside outside of Azrou, Morocco.

Edwin Giesbers / Barbary macaques (Macaca sylvanus) in their enriched outdoor enclosure, Ouwehands Zoo, Rhenen, The Netherlands. Captive.; Ouwehands Zoo, Rhenen, The Netherlands. Captive.

Oriol Alamany / Barbary macaque (Macaca sylvanus) in the cedar and oak forests of the Moyen Atlas, Morocco, December

Oriol Alamany / Barbary macaque (Macaca sylvanus) in the cedar and oak forests of the Moyen Atlas, Morocco, December

Claudio Contreras / Barbary Macaque (Macaca sylvanus) grooming, Ifrane Forest National Park, Morocco, October

Claudio Contreras / Barbary Macaque (Macaca sylvanus) grooming, Ifrane Forest National Park, Morocco, October

Claudio Contreras / Barbary Macaque (Macaca sylvanus), Ifrane Forest National Park, Morocco, October

Claudio Contreras / Barbary Macaque (Macaca sylvanus) baby, Ifrane Forest National Park, Morocco, October

Sylvain Cordier / Barbary macaque (Macaca sylvanus), mother and baby, captive.

Edwin Giesbers / Barbary macaque (Maccaca sylvanus) with baby, scares off another juvenile, Gibraltar, UK, July.

Edwin Giesbers / Barbary macaque (Maccaca sylvanus) with baby, Gibraltar, UK, July.

Edwin Giesbers / Close-up of a Barbary macaque (Maccaca sylvanus) baby suckling, Gibraltar, UK, July.

Sylvain Cordier / Barbary macaque (Macaca sylvanus), infant and adult male, La Montagne des Singes, Alsace, France, captive

Sylvain Cordier / Barbary macaque (Macaca sylvanus), baby between two males (males use the baby to reduce aggression), La Montagne des Singes, Alsace, France, captive

Sylvain Cordier / Barbary macaque (Macaca sylvanus), baby with adult, La Montagne des Singes, Alsace, France, captive.

Sylvain Cordier / Barbary macaque (Macaca sylvanus), baby clinging onto adult, La Montagne des Singes, Alsace, France, captive

Sylvain Cordier / Barbary macaque (Macaca sylvanus), baby between two males (males use the baby to reduce aggression), La Montagne des Singes, Alsace, France, captive

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait, Gibraltar Nature Reserve, Gibraltar. June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait of two sitting together, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait of two sitting together, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) close up portrait, Gibraltar Nature Reserve, Gibraltar

Edwin Giesbers / Barbary macaque (Macaca sylvanus), Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus), female with suckling baby, photographerd by female tourist. Gibraltar Nature Reserve, Gibraltar, Tourist, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) portrait, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) female resting on rock, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) two sitting silhouetted on rocks, Gibraltar Nature Reserve, Gibraltar,

Edwin Giesbers / Barbary macaque (Macaca sylvanus) feeding on leaves, Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) reaching out to play with strap of woman's top. Gibraltar Nature Reserve, Gibraltar,

Edwin Giesbers / Barbary macaque (Macaca sylvanus) walking silhouetted, Gibraltar Nature Reserve, Gibraltar,

Edwin Giesbers / Barbary macaque (Macaca sylvanus) sitting, silhouetted against blue sky. Gibraltar Nature Reserve, Gibraltar, June.

Edwin Giesbers / Barbary macaques (Macaca sylvanus) two sitting close together next to memorial sign for 'Michael' the longest living macaque in Gibraltar. Gibraltar Nature Reserve, Gibraltar, June.