Topics: Red deer - Wikipedia
Although at one time red deer were rare in parts of Europe , they were never close to extinction. Reintroduction and conservation efforts, such as in the United Kingdom and in Portugal ,  have resulted in an increase of red deer populations, while other areas, such as North Africa , have continued to show a population decline.
The European red deer is found in southwestern Asia (Asia Minor and Caucasus regions), North Africa and Europe. The red deer is the largest non-domesticated land mammal still existing in Ireland.  The Barbary stag (which resembles the western European red deer) is the only member of the deer family represented in Africa, with the population centred in the northwestern region of the continent in the Atlas Mountains.  As of the mid-1990s, Morocco , Tunisia and Algeria were the only African countries known to have red deer. 
In Argentina and Chile, the red deer has had a potentially adverse impact on native animal species, such as the South Andean deer or huemul ; the International Union for Conservation of Nature and Natural Resources has labelled the animal as one of the world's 100 worst invaders.