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
Operation Enduring Freedom – Horn of Africa Horn of Africa, Gulf of Aden, Red Sea, North Arabian Sea and the Gulf of Oman. On 21 January 2006, , an "Arleigh Burke"-class destroyer, captured a vessel operating off the Somali coast whose crew were suspected of piracy. On 18 March 2006, , a "Ticonderoga"-class cruiser and , an "Arleigh Burke"-class destroyer, engaged pirate vessels after receiving fire from them. On 3 June 2007, , a landing ship dock, engaged pirates attacking a freighter, but failed to repel them. On 28 October 2007, the destroyer , opened fire on pirates who had captured a freighter and with other vessels