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Nectar robbing in Blue Tits Parus caeruleus: failure of a novel feeding trait to spread |
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| Authors: | Charles F. Thompson Graham F. Ray Robert L. Preston |
| Affiliation: | Ecology Group, Department of Biological Sciences, Illinois State University, Normal, IL 61761-6901, USA;Lady Margaret Hall, Oxford 0X2 6QA, UK;Deceased |
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