Attributes / relations provided by
♦ ¹The Feeding Ecology of Tanagers and Honeycreepers in Trinidad, Barbara K. Snow and D. W. Snow, The Auk Vol. 88, No. 2 (Apr., 1971), pp. 291-322
♦ ²"Notes on the biology of the Cock-of-the-rock(Rupicola rupicola)", D. W. Snow, Journal für Ornithologie July 1971, Volume 112, Issue 3, pp 323-333