Extending from the tip of the Horn of Africa and into the northwest Indian Ocean, this 250km-long archipelago comprises four islands and two rocky islets. Rich biodiversity and distinct flora and fauna make these remote islands of universal importance. About 37% of Socotra's plant species, 90% of its reptile species and 95% of its land snail species are not found anywhere else in the world. Globally significant populations of land and sea birds including a number of threatened species either breed on the islands or are regular migrants. The marine life of Socotra is also very diverse.