During reorganisation of the Leiden bird collection a mounted harrier was found what seemed to be one of the still lost specimens collected by Darwin. After closer research it turned out it was indeed the last missing harrier of the Darwin collection.

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Zoologische Mededelingen

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Naturalis journals & series

van Grouw, H., & Steinheimer, F. D. (2008). Charles Darwin’s lost Cinereous Harrier found in the collection of the National Museum of Natural History Leiden. Zoologische Mededelingen, 82(48), 595–598.