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Ornithology / Botany / Willow Warbler / Francis Willughby / William Derham / John Ray / Trochilus / Fellows of the Royal Society / Biology / Leaf-warbler


Leers The Auk 122(2):706–707, 2005 © The American Ornithologists’ Union, 2005. Printed in USA. Sibling species were first recognized by William Derham (1718).—Sibling species are closely related
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Document Date: 2005-09-07 19:44:52


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