Attributes / relations provided by
♦ 1Higgins, PJ, Peter, JM and Cowling, SJ.
(eds), (2006) Handbook of Australian, New Zealand and Antarctic birds, Volume 7: Boatbill to starlings. Oxford University Press, Melbourne
♦ 2Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014.
EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
♦ 3del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.