Attributes / relations provided by
♦ ¹O'Donnell, Colin F J and Dilks, Peter J, Foods and Foraging of Forest Birds in Temperate Rainforest, South. Westland, New Zealand, NZ J Ecology 18(2) (1994) pp. 87-107
♦ ²Distribution and diet of chamois (Rupicapra rupicapra) in Westland forests, South Island, New Zealand, Ivor J. Yockney and Graham J. Hickling, New Zealand Journal of Ecology (2000) 24(1): 31-38
♦ ³del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.