History of the birds of NZ 1st ed p152-2.jpg
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History of the birds of NZ 1st ed p152 2, A History of the Birds of New Zealand by Buller, Callaeas wilsoni (illustrations), Corvoidea illustrations, Callaeas cinereus (illustrations), Originals
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History of the birds of NZ 1st ed p152 2, North Island Kōkako, left, has blue wattles, and South Island Kōkako, right, has orange wattles.
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NZ第1版第1刷第152号2頁、Bller, Callaeas wilsoniによるニュージーランドの鳥類の記載
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NZの鳥類の進化図1 ed p152 2 北島甲賀子 左は青いワトル、右は南島甲賀子 オレンジワトル。
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