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.
♦ 2Food habits of ungulates in dry tropical forests of Gir Lion Sanctuary, Gujarat, India, Jamal A. KHAN, Acta Theriologica 39 (2): 185-193,1994.