1. Department of Zoology and Environmental Biology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Enugu State, Nigeria
2. A.P. Leventis Ornithological Research Institute, Department of Zoology, University of Jos, Jos, Plateau, Nigeria
3. Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka, Enugu State, Nigeria