5445681
9780691134772
'THe Wheeler Guides' will help birders and biologists navigate the pitfalls of raptor identification, including raptors' often extreme variation by age and sex as well as the existence of numerous 'confusion' species.Wheeler, Brian K. is the author of 'Raptors of Western North America The Wheeler Guide', published 2007 under ISBN 9780691134772 and ISBN 0691134774.
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