Ciawlui-hak
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Ciawlui-hak (鳥類學 ornithology) si zoanbuun teq giefnkiux ciawlui ee toxngbut-hak hagkhøf.
Ciawlui-hak (鳥類學 ornithology) si zoanbuun teq giefnkiux ciawlui ee toxngbut-hak hagkhøf.