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.
♦ ²Eira barbara, Steven J. Presley, MAMMALIAN SPECIES No. 636, pp. 1–6 (2000)