Attributes / relations provided by
♦ ¹Agüero, M. L., Borboroglu, P. G., & Esler, D. (2014). Trophic ecology of breeding white-headed steamer-duck (Tachyeres leucocephalus). Waterbirds, 37(1), 88-93.
♦ ²del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.