The Llanos de Moxos, also known as the Beni savanna or the Moxos plains, is a tropical savanna ecoregion of northern Bolivia.
The Llanos de Moxos covers an area of 126,100 square kilometers (48,700 sq mi) in the lowlands of northern Bolivia, with small portions in neighboring Brazil and Peru. Most of the Llanos de Moxos lies within the departments of El Beni, Cochabamba, La Paz, Pando, and Santa Cruz. The Llanos de Moxos occupies the southwestern corner of the Amazon basin, and the region is crossed by numerous rivers that drain the eastern slope of the Andes Mountains. The low relief of the savannas, coupled with wet season rains and snowmelt from the Andes, cause up to half the land to flood seasonally.
The Llanos de Moxos is surrounded by tropical moist forests; the Southwestern Amazonian moist forests to the north, west, and south, and the Madeira-Tapajós moist forests to the east.
The climate of the Llanos de Moxos is tropical, with pronounced wet and dry seasons. The wet season generally extends from December to May, and annual rainfall ranges from 1300 in the east to 2000 mm in the west.
The ecoregion comprises a mosaic of savannas and wetlands, with islands of forest and gallery forests along rivers. Flooding and fire are important ecological factors.
The Llanos de Moxos is home to the blue-throated macaw (Ara glaucogularis), which is critically endangered.