Morepork Morepork The morepork ("Ninox novaeseelandiae"), also called the ruru or Tasmanian spotted owl, is a small brown owl found throughout New Zealand and Tasmania. Described by Johann Friedrich Gmelin in 1788, it was for many years considered to be the same species as the southern boobook of mainland Australia until 1999. Its name is derived from its two-tone call. Four subspecies of the morepork are recognized, one of which is extinct and another that exists only as a hybrid population. The bird has almost 20 alternative common names, including mopoke and boobook — many of these names are onomatopoeic, as
Southern boobook to "N. connivens". Genetic and call analysis show the Christmas boobook ("N. natalis") to be very close to the Australian populations of the southern boobook, leading Gwee and colleagues to suggest it be reclassified within this species. Gwee and colleagues found that boobook populations on larger mountainous islands were more distinct from Australian stock, while those on flatter smaller islands were much more similar, suggesting that these locations were colonised much more recently after previous populations had become extinct. Eleven subspecies of "Ninox boobook" are recognised in version 7.3 of the IOC World Bird List, published in July 2017: The