Attributes / relations provided by
♦ ¹del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ²SYMENS, P. (1988). Effects of the mass migration of desert locusts Schistocerca gregaria on birds in the Taif area. Arabia.