The Northern Khorat Plateau moist deciduous forests ecoregion (WWF ID:IM0138) covers a small area on the border between northeastern Thailand and Laos, in the transition zone between the drier Khorat Plateau to the south and the wetter Annamite Range of mountains to the north. Much of the ecoregion has been converted to agriculture along the floodplain of the middle course of the Mekong River.