| Title |
Identification of Daurian Jackdaw |
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| Author |
Paul J. Leader |
| Language |
English |
| Magazine |
British Birds, vol. 96, no. 10, 2003
|
| Page |
520 - 523 |
Contents
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Article on the identification of Daurian Jackdaw [Corvus dauuricus] and in particular the separation of first-winter Daurian and Eurasian Jackdaw.
Abstract:
Daurian Jackdaw [Corvus dauuricus] has three distinct age-related plumages: both juveniles and adults are pied, but first-years have largely black plumage. Some authorities state that adults can occur in two plumage morphs, pied and all-dark; examination of almost 200 skins of Daurian jackdaws, however, showed that, without exception, all-dark individuals proved to be first-years, while pied individuals were adults. Furthermore, the head streaking of first-years, often mentioned as a key separation feature from Eurasian Jackdaw [G. monedula], varies according to time of year. As a consequence, first-winter Daurian jackdaws may be overlooked in Europe.
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