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Winter Fighting in Feeding Flocks of Rooks,Jackdaws and Carrion Crows |
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| Authors: | J. D. Lockie |
| Affiliation: | 1. Edward Grey Institute , Oxford;2. Nature Conservancy , Edinburgh |
| Abstract: | The great majority of Oystercatchers sport a white collar outside the nesting season. The authors discuss the incidence of this plumage character and its significance to Oystercatcher breeding behaviour. |
| Keywords: | |