Horn of Africa periodic monsoon winds and irregular rainfall. Mean daily maximum temperatures range from , except at higher elevations along the eastern seaboard, where the effects of a cold offshore current can be felt. Somalia has only two permanent rivers, the Jubba and the Shabele, both of which begin in the Ethiopian Highlands. About 220 mammals are found in the Horn of Africa. Among threatened species of the region, there are several antelopes such as the beira, the dibatag, the silver dikdik and the Speke's gazelle. Other remarkable species include the Somali wild ass, the desert warthog, the hamadryas baboon, the Somali
German horn players since about 1930 because of the increasing ubiquity of the German horn. Since that time, the true French horn's use has been confined mainly to France, and even in that country the German horn was already gaining favour with some French players as early as 1938. In the late seventeenth century, French makers became preeminent in the manufacture of hunting horns, and were credited with the creation of the now-familiar, circular "hoop" shape of the instrument. As a result, even in England these instruments were often referred to by their French names, "trompe de chasse" or "cor de chasse"