The present work was done on the basis of the registered type specimens available in the National Zoological Collection present in the Headquarters, Zoological Survey of India Kolkata. This work deals with altogether 170 species and sub-species belonging to 122 genera, under 41 families in the main text, and 43 species and sub-species belonging to 37 genera, under 18 families in the Appendix from India and abroad.
Most of the bird species in this catalogue are having type locality in India and rests are extra-limital in Origin (type locality). All extra-limital species excluding Pakistan, Bangladesh and Sri Lanka are kept in the Appendix. A few species having extra-limital in origin but distributed in India are also kept in the main text.