Rock of Gibraltar may have originated from an escape of North African animals transported to Spain; it is also possible that the original Gibraltar macaques are a remnant of populations that are known to have spread throughout Southern Europe during the Pliocene, up to 5.5 million years ago. Some animals of the Rock have been reintroduced by the Alameda Wildlife Conservation Park who have three Barbary macaques. The Rock of Gibraltar, at the head of the Strait, is a prominent headland, which accumulates migrating birds during the passage periods. The vegetation on the Rock, unique in southern Iberia, provides a temporary home for
Footpaths of Gibraltar is that of a number of feral goats which have caused serious damage to the vegetation, although eradication efforts are being pursued. Footpaths of Gibraltar The footpaths of Gibraltar provide access to key areas of the Upper Rock Nature Reserve, a refuge for hundreds of species of flora and fauna which in some cases are found nowhere else in Europe. The reserve occupies the upper part of the Rock of Gibraltar, a long and narrow mountain that rises to a maximum height of above sea level, and constitutes around 40 per cent of Gibraltar's total land area. The unusual geology