The Indomalayan realm is one of the world’s eight major biogeographical realms, with 18 bioregions in total. The realm is dominated by moist broadleaf forests and coastal mangroves and contains thousands of islands. The Arakan mountain range, which runs down the middle of this realm, divides it roughly in two halves. The western half is capped by the long, curving mountain range of the Himalayas and includes the dry forests, scrublands, and deserts of the Indian subcontinent. In the east, the realm extends northward to the edge of the Yunnan and Guizhou plateaus and below the temperate forests of the Changjiang plain in China. The realm includes the subtropical evergreen forests of southeast China, the Indochinese Peninsula, the Philippines, and most of Indonesia. With its dense rainforests, this is one of the most important areas for biodiversity in the world, encompassing one-fifth of the Earth’s plant, animal and marine species. The region contains three mega-diverse countries — Indonesia, Malaysia and the Philippines — where four of the world's 25 biodiversity hotspots are located.

Projects that require funding are identified for each bioregion on the map below. Click a number icon to open the associated project listings.