Abstract
THE status of the common sheld-duck, Tadorna tadorna (L.), in Great Britain and Ireland has long been described in the ornithological literature as being similar to that of other British breeding ducks, namely, a resident species the numbers of which are increased by immigrants from the continent of Europe in winter and by passage migrants in spring and adtumn. This description, however, gives a very inadequate and misleading impression of the complete life-history, as will be seen from the following findings, the result of many years study of sheld-ducks in this field :
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References
Hoogerheide, J., and Kraak, W. K., Ardea, 31, 12 (1942).
Goethe, F., "Die Vogelinsel Mellum", Abh. Geb. Vogelk., Berlin, 4 (1940).
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Coombes, R. Sheld-Ducks : Migration In Summer. Nature 164, 1122–1123 (1949). https://doi.org/10.1038/1641122a0
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DOI: https://doi.org/10.1038/1641122a0
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