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.
♦ ²Nectar feeding by rock wren (Xenicus gilviventris), COLIN F. J. O’DONNELL, JAMES T. REARDON, JOANNE M. HOARE, Notornis, 2011, Vol. 58: 46-47