AGE – BEST CRITERIA:
In 1cy, moult contrast is present in GC, most often in the central part of the arm. Adult birds show a uniform and freshly moulted plumage.
1cy July. GC1-5 are juvenile with a rusty hue and rather large pale buffish tip. Inner post-juvenile inner GC6-10 have a slightly more dense structure and lack pale tips. In this individual the post-juvenile GC are almost as rusty as the juvenile outer ones, but in most birds the newly aquired GC are slightly less rusty, and more cold olive brown. [2KR44293]
2cy+ August. Fresh adult wing showing uniformly post-breeding GC and lack of any moult contrasts. This bird shows some weak pale tips to the outer GC, but note that feather structure, wear and ground colour indicate that they are still of the same generation. [AV28320]
1cy August. Most young birds show uniformly juvenile TT, but a few (like here) may show two generations of feathers. Note the post-juvenile innermost T, same generation as inner GC, but showing a contrast to the two longer juvenile TT (slightly less dense and a trifle more rusty, less olive). [2KR44343]
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