**Acknowledgements**

We gratefully acknowledge WWF-India for financial and logistic support during the survey. We express our sincere, thanks to the Chief Wildlife Warden, Uttar Pradesh for permission to undertake the survey and for providing accommodation and other help. We appreciate field assistance of boat men of Katerniaghat Wildlife Sanctuary, during the surveys. We thank anonymous reviewer for constructive reviews of the manuscript, which substantially improved the quality of the manuscript.
