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Keywords from Image Description:
CryptolphaAbrornisKeulemans. Cryptolopha nigrorum Phylloscopus nigrorum and Abrornis olivacea Phylloscopus olivaceus archive org page Ibis Creator John Gerrard Keulemans PDold File CryptolphaAbrornisKeulemans File Phylloscopus nigrorum Keulemans File Phylloscopus olivaceus Keulemans Ibis Phylloscopus nigrorum Phylloscopus