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Circus melanoleucos Keulemans. Mnnliche adulte Elsterweihen Circus melanoleucos Lithographie von John Gerrard Keulemans Male adult Pied Harriers Circus melanoleucos lithograph by John Gerrard Keulemans Anderson John org page Anatomical and Zoological Researches comprising an account of the Zoological results of the two expeditions