G. R. Gray, 1845,
Sometimes placed in genus Nettion. Commonly treated as conspecific with A. aucklandica and A. nesiotis, and relationship clearly very close, but sometimes separated out#R#R and differs from both in its more obvious speculum in male (2); different patterning on upperparts in male (clear pale borders of feathers vs none, much less close barring, no green reflections in dorsal feathering) (3); generally more white at base of foreneck (1); larger size (wing female 194±8 vs 120±0; effect size 9.25; score 3)#R. Population of South I has sometimes been assigned a separate subspecies, peculiaris. Hybridization with A. platyrhynchos recorded. Monotypic.
Great Barrier I and isolated areas of North I (Mimiwhangata Bay and Teal Bay) and SW South I (Fiordland), in New Zealand; formerly more widespread (including Chatham Is). Reintroduced at several locations (Coromandel, Tawharanui, Cape Kidnappers, Tuhua I), but uncertain as yet if these populations will survive.
Food and feeding
Status and conservation
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