The lands bordering the Mediterranean Sea in southern Europe, north Africa, and western Asia are home to the Mediterranean basin ecoregions, which together constitute world's largest and most diverse mediterranean climate region of the world, with generally mild, rainy winters and hot, dry summers. The Mediterranean basin's mosaic of forests, woodlands, and scrub are home to 13,000 endemic species. "Conservation International" has designated the Mediterranean basin as one of the world's biodiversity hotspots.