The Brown Teal or New Zealand TealAnas chlorotis is a species of dabbling duck of the genus Anas. The Maori name for it is Pāteke. It was considered to be conspecific with the flightless Auckland and Campbell Teals, Anas aucklandica and A. nesiotis. The name "Brown Teal" was applied to that entire taxon. The Brown Teal has since been split, recognizing that the insular A. aucklandica and A. nesiotis are good species. In international use, the name Brown Teal is still more common than New Zealand Teal for this bird.
The Brown Teal is rather nocturnal in habit by dabbling duck standards. This seems to be an evolutionary response to the fact that most predators on New Zealand, before humans arrived and brought with them carnivorous mammals, were diurnal birds such as Haast’s Eagle or skuas. Wikipedia These photos were in the Auckland Zoo (2101, 2125) and on Tiritiri Mattanagi (5887, 5902). It has a characteristic white ring around its eye (5897).