Brahmaputra Valley semi-evergreen forests

The Brahmaputra Valley semi-evergreen forests are a tropical moist broadleaf forest ecoregion located in Northeastern India, southern Bhutan, and adjacent Bangladesh.

This ecoregion covers an area of 56,700 square kilometers (21,900 sq mi) and encompasses the alluvial plain of the upper Brahmaputra River as it moves westward through Assam.

The valley lies between the Himalayas to the north and the Lushai hills to the south. During the monsoon season (June to September), the river floods, bringing rich soils onto the plain and creating a fertile environment.

The original semi-evergreen forest now exists only in patches due to extensive farming. Typical canopy trees include evergreen species like Syzygium, Cinnamomum, and Magnoliaceae, along with deciduous species like Terminalia myriocarpa, Terminalia citrina, and Terminalia tomentosa.

Despite centuries of human clearance, the forests and grasslands along the river remain a habitat for a variety of wildlife, including the tiger, clouded leopard, capped langur, gaur, barasingha deer, sloth bear, wild water buffalo, Asian elephants, and the world's largest population of Indian rhinoceros.