Nor Amira Abdul Rahman (2014) “The Numerical Competency of Two Bird Species (Corvus splendens and Acridotheres tristis)”, Tropical Life Sciences Research, 25(1), pp. 95–103. Available at: https://ejournal.usm.my/tlsr/article/view/tlsr_vol25-no-1-2014_7 (Accessed: 3 April 2025).