As mentioned in the Collins Guide some females appear "almost as dark-throated as males" when worn, and since the photo is taken in January, the abrasion is almost 6 months on.
The same guide also establishes that 1.winter males only differ from adults by their juvenile remiges and retrices.
Best regards
Peter
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English version
Peter Sunesen skriver onsdag 1. juni 2011 kl. 23.15