predator-free islands were mooted but either never acted on or were derailed due to the lack of suitable sanctuaries. References External links Piopio, the New Zealand thrush - New Zealand Birds Limited South Island Piopio. Turnagra capensis. by Paul Martinson. Artwork produced for the book Extinct Birds of New Zealand, by Alan Tennyson, Te Papa Press, Wellington, 2006 North Island Piopio. Turnagra tanagra. by Paul Martinson. Artwork produced for the book Extinct Birds of New Zealand, by Alan Tennyson, Te Papa Press, Wellington, 2006 Extinct birds of New Zealand Higher-level bird taxa restricted to New Zealand Species made extinct by human activities Species endangered by invasive species Holocene extinctions Species endangered by deforestation