Liên quan Asio Asio stygius Asio otus Asio capensis Asiophrida luzonica Asiorella Asiophrida hirsuta Asio abyssinicus Asiophrida Asio madagascariensis
Tài liệu tham khảo WikiPedia: Asio otus http://www.birds.cornell.edu/clementschecklist/dow... http://www.iucnredlist.org/details/22689507/0
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