This rarely-sighted white tūī, and friend, have been frequent visitors to Nathan Pye's Bay of Plenty garden recently. Photo / Nathan Pye This rarely-sighted white tūī, and friend, have been frequent visitors to Nathan Pye’s Bay of Plenty garden recently. Photo / Nathan Pye

 The rarely-sighted white tūī's colour is likely the result of genetic mutation and it does not have the pink eyes of an albino, Dr Colin Miskelly of Te Papa says. Photo / Nathan Pye The rarely-sighted white tūī’s colour is likely the result of genetic mutation and it does not have the pink eyes of an albino, Dr Colin Miskelly of Te Papa says. Photo / Nathan Pye