Acknowledgements
The authors are thankful to the H.O.D., Department of Zoology, West Bengal State University, Barasat, West Bengal, India, for the necessary permission to perform the initial observations. The authors are grateful to Dr. Narayan Ghorai, Department of Zoology, WBSU, and Dr. Kuladeep Roy, Assistant Manager, WWF-India, WBSO, for their kind support throughout the study. The authors are also thankful to AnneshaLahiri, Uttam Gupta, SayokDolui and LoknathSaha for giving constant encouragement.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Authors’ contributions
The manuscript was conceptualized, drafted and supervised by AIM; AM helped equally in data curation, and both authors analysed the data. AIM contributed to the field work. Both authors read and approved the final manuscript.
Additional information
Notes on contributors
Md. Abu Imran Mallick
Md. Abu Imran Mallick is with the Department of Zoology at West Bengal State University in India.
Arpita Mondal
Arpita Mondal is with the Department of Zoology at West Bengal State University in India.