Murphy, E; Keedwell, R; Brown, K; Westbrooke, I (2004). "Diet of mammalian predators on braided river beds in the central South Island, New Zealand". Wildlife Research. 31 (6): 631–638. doi:10.1071/wr03033.
Wiersma, P; Kirwan, G. M. (2019). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A; de Juana, Eduardo (eds.). "Wrybill (Anarhynchus frontalis)". Handbook of the Birds of the World Alive. Barcelona: Lynx Edicions. Retrieved 2 March 2019.