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Keywords from Image Description:
PZSLPage. above Bucorvus abyssinicus Bucorvus abyssinicus Boddaert Linnaeus en Syrinx of Abyssinian Ground Hornbill above and Rhinoceros Hornbill below from frontal Proceedings of the Zoological Society of London org vol issue org page page published Beddard text PDold PZSL Bucerotidae anatomy Bucorvus abyssinicus Buceros