1. The birds of the Andaman and Nicobar islands;Abdulali;J. Bombay Nat. Hist. Soc.,1964
2. The birds of the Nicobar islands, with notes on some Andaman birds;Abdulali;J. Bombay Nat. Hist. Soc.,1967
3. The Handbook of the Birds of India and Pakistan;Ali,1983
4. Anonymous, 1996. Country Report 1992–1996. Sri Lanka. Field Ornithology group of Sri Lanka, Univ. of Colombo.