Kolleru Lake is one of the largest freshwater lakes in India and a crucial for several waterbirds. Mr. Ashok Kumar’s work here focused on documenting bird populations, advocating for wetland protection, and raising awareness about threats to this vital ecosystem.


Letter (dated 11-01-1978) to Sri R.K.Rao, IFS, Assistant Chief Conservator of Forests to propose Kolleru lake as a bird sanctuary.
Publications related to Kolleru Lake
Kumar, S. A., 1979a. Birdwatching at Kolleru Lake. Newsletter for Birdwatchers 19 (3): 4–6.
Kumar, S. A., 2003c. Kolleru – a ghost lake. Newsletter for Birdwatchers 43 (3): 35–37.
P A Azeez, S Ashok Kumar, B C Choudhury, VNVK Sastry, Sanjay Upadhyay, K Mruthyunjaya Reddy and K Kameshwara Rao (2011). Report on the proposal for downsizing the Kolleru Wildlife Sanctuary (+5 to +3 feet contour). Report submitted to The Ministry of Environment and Forests Government of India. Pp 1-196+iv.
