Terai–Duar savanna and grasslands
The Terai–Duar savanna and grasslands is a narrow lowland ecoregion at the base of the Himalayas, about wide, and a continuation of the Indo-Gangetic Plain in India, Nepal and Bhutan. It is colloquially called Terai in the Ganges Basin east to Nepal, then Dooars in West Bengal, Bhutan and Assam east to the Brahmaputra River. It harbours the world's tallest grasslands, which are the most threatened and rare worldwide. Location and description This tropical and subtropical grasslands, savannas, and shrublands biome stretches from western Bhutan to southern Nepal's Terai, westward to Banke, covering the Dang and Deukhuri Valleys along the Rapti River to India's Bhabar and Doon Valley. Each end crosses the border into India's states of Uttarakhand, Uttar Pradesh and Bihar. The eastern and central areas are wetter than the western end. In Nepal, the wetlands of Koshi Tappu Wildlife Reserve, Beeshazar Tal in the bufferzone of Chitwan National Park, Jagdishpur Reservoir and Ghodaghodi Tal are designated Ramsar sites. The Sukla Phanta Wildlife Reserve is Nepal's largest patch of continuous grassland. Flora The Terai–Duar savanna and grasslands are a mosaic of tall riverside grasslands, savannas and evergreen and deciduous forests, depending on soil quality and the amount of rain