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Keywords from Image Description:
CBBM . Heteroglaux blewittii sic Hume Hume en Forest Owlet tips of outer primaries from ventral left and beak from lateral right Catalogue of the birds in the British Museum archive org Vol Page creator John Gerrard Keulemans Richard Bowdler Sharpe text PDold CBBM Heteroglaux blewitti Strigidae anatomy Beaks Bird wings Strigidae