Located at a distance of about 46 Kms in the southwest direction from Dhemaji, Bordoibam Bilmukh Bird Sanctuary is shared between the districts of Dhemaji and Lakhimpur. Covering an area of around 11.25 sq.km, this bird sanctuary is the breeding for many bird species, most notably the Whistling Teal. It was in 1996 that the then government of Assam officially declared this region a wildlife sanctuary.
The best time to visit the bird sanctuary is in the winter season when many migratory birds land here to escape the harsh winters in northern Asia. Common bird sightings here include the fishing eagle and the adjutant stork. Among the prized bird species to be spotted here include Chestnut Bittern, Openbilled Stork, Indian Roller and Blackheaded Oriole.
Aquatic flora dominates the sanctuary due to it mostly being a water body. Semi-aquatic vegetation and trees are found along the banks of the Bil.