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.
♦ 2The Serengeti food web: empirical quantification and analysis of topological changes under increasing human impact, Sara N. de Visser, Bernd P. Freymann and Han Olff, Journal of Animal Ecology 2011, 80, 484–494