Among the different component of the rich biodiversity of Northeast India, avian fauna is one of the most prominent. Available information on avian fauna is reviewed and data are pooled together and analysed. Altogether 818 species of avian fauna belonging to 339 genera and 70 families are distributed throughout the Northeastern States. Among the seven the states, Assam harboured highest numbers
... [Show full abstract] of 689 species and 53.49% of total birds species of Indian sub-continent which is followed by Arunachal Pradesh, 646 birds species 50.19%, Manipur 523 species and 40.61%, Nagaland, 451 and 35.01%, Meghalaya, 366 species and 28.42%, Mizoram, 243 and 18.87%, Tripura has lowest number of 139 species which is 10.79% of total bird species found in Indian subcontinent. The region also harboured 23 endemic species and 50 Indian Red Data Book threatened species. The state of Assam represented highest numbers of both endemic and threatened species within North eastern region.