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 fruits of selectivity: how birds forage on Goupia glabra fruits of different ripeness, H. Martin Schaefer, Veronika Schaefer, J Ornithol (2006) 147:638–643