**Acknowledgements**

We would like the thank our host institution, St. Edmund's College, Shillong, Meghalaya, for the support. We would also like to thank our guide and mentor, Prof. (Mrs.) R.N.K. Hooroo, North Eastern Hill University, for the guidance during our research. We are grateful to the Chief Conservator of Forest, Wildlife Circle, Government of Meghalaya and Chief Wildlife Warden, Meghalaya, Shillong for permission to carry out our work. We also thank the Department of Forest and Environment, Government of Meghalaya for the valuable resources.
