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South Island piopio : ウィキペディア英語版 | South Island piopio
The South Island piopio (''Turnagra capensis'') also known as the New Zealand thrush, was a passerine bird of the Oriolidae family. ==Taxonomy== Two subspecies are recognised, the nominate ''T. c. capensis'' from the South Island mainland, and the much smaller Stephens Island piopio (''T. c. minor'') from Stephens Island, which is often considered to be based on juvenile birds, but seems to be valid (Medway, 2004b). The assumption of the well-flying bird evolving into a distinct subspecies on the small (2.6 km2) island close (3.2 km) to the mainland seems hard to believe, but Stephens Island must have held a population of many hundred birds in 1894 (Medway, 2004a), and the piopio was apparently a reluctant flyer, not usually being found on offshore islands. For a long time the South Island piopio was considered conspecific with the North Island piopio that dwelt on New Zealand's North Island, but later they were recognised as two distinct species due to pronounced differences in external appearance and osteology (Olson ''et al.'', 1983).
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