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
Gibraltar Rock (Western Australia) early part of the twentieth century. As of 1962, the average annual rainfall in the area was roughly per year. Gibraltar Rock has been described as "an enormous hunk of rough granite that provides the longest and most serious slab climbing in WA." The first organised climb by the Climbers Association of Western Australia was done in 1974. One of the faces of the rock is called Dockyard Wall. It was originally graded 17 crux climb. Two climbing bolts were added to this route in 1992. Other routes up the mountain include Second Anniversary Waltz, Crime of Passion, Dinosaur, Apes