Barbary macaques in Gibraltar Barbary macaques in Gibraltar Originally from the Atlas mountains and the Rif mountains of Morocco, the Barbary macaque population in Gibraltar is the only wild monkey population on the European continent. Although most populations in Africa are experiencing declining populations due to hunting and deforestation, the population of Barbary monkeys in Gibraltar is increasing. Currently, some 300 animals in five troops occupy the Upper Rock area of the Gibraltar Nature Reserve, though they make occasional forays into the town. As they are a tailless species, they are also known locally as Barbary apes or rock apes, despite being monkeys ("Macaca
On the Origin of Species to be separate species produced fertile hybrid offspring freely, and in other cases what were considered to be mere varieties of the same species could only be crossed with difficulty. Darwin concluded: "Finally, then, the facts briefly given in this chapter do not seem to me opposed to, but even rather to support the view, that there is no fundamental distinction between species and varieties." In the sixth edition Darwin inserted a new chapter VII (renumbering the subsequent chapters) to respond to criticisms of earlier editions, including the objection that many features of organisms were not adaptive and could not