The mighty Brahmaputra of Assam is a braided river. It carries a huge amount of sand from upstream which gets deposited on its beds. Almond-shaped River islands are formed out of these alluvium deposits which are locally known as chars or tapus and are home to many wild animals and birds. The vast areas of arable and fertile lands of the chars of Brahmaputra attract marginal and landless people, mainly the migrant Muslim people of East Bengal origin, from various parts of the state. These poor and marginal people settle on the tapus and with the passage of time creates ecological imbalances in the chars. This paper basically is an investigation of the migration to the chars of river Brahmaputra near Burhachapori Wildlife Sanctuary under Nagaon Wildlife Division of Assam. Through a primary survey, the study aims to identify the source areas of migration and also to delineate the factors responsible for their migration decision. The study finds that the human settlement on the tapus breaks out a multi-dimensional conflict between the migrants and the wild animals as well as between migrants and forest managers and local khuti dwellers.