Muhammad, N.D., and Z.K. Mustapha. “Collapsing towards Extinction? Trade in Birds Carcasses for Traditional Medicine and the Decline of Vulture Population in Katsina State, Nigeria”. Journal of Applied Sciences and Environmental Management 24, no. 4 (May 22, 2020): 575–580. Accessed September 27, 2026. https://www.ajol.info/index.php/jasem/article/view/196072.