502 species of birds have been recorded from the Dibru-Saikhowa biosphere reserve. Avifaunal diversity is very common in that biosphere reserve. But at least 5 critically endangered species were recorded that included Houbaropsis bengalensis, Gyps bengalensis, Gyps tenuirostris, Sarcogyps calvus and Ardea insignis. The list also includes 5 endangered species Branta ruficollis, Cairina scutulata, Tringa guttifer, Aythya baeri and Leptoptilos dubius. In addition 10 vulnerable and, 13 near threatened a few range extensions were also recorded. The purely exotic birds based on the native range distribution are Acridotheres cinereus, Lonchura molucca, Bradypterus seebohmi .While the endemic birds of India is Paradoxornis flavirostris. The biosphere reserve reserve area was primarily meant for the conservation of the endangered White winged wood duck (Cairina scutulata) in its natural habitat. Presence of two ‘forest villages’, habitat destruction through agriculture, logging, settlement, and poisoning of water bodies for fishing, and erosion by rivers were noticed as major threats to Dibru-Saikhowa biosephere reserve birds.
