AGE – BEST CRITERIA:
In 1cy, whole plumage is fresh, including wing and tail. Adult shows worn wing and tail. Birds from both age classes may or may not show moult contrasts in innermost GC7-10 (occasionally even further out in the wing).
- Whole wing is fresh. Signs of wear starts to show in tips of PP during mid or late autumn.
- Tail is fresh and nearly always unifomly juvenile (and if a single R was moulted, both generations are in good condition).
- Colour of iris is rather cold brownish-grey, but the difference to adult is not always obvious.
- Whole wing is worn, often notably so in GC, PC and tips of PP. A few inner GC or a single T may be moulted (and then fresh).
- Whole tail is worn, but occasionally single RR may have been included in the post-breeding moult.
- Colour of iris is generally warmer greyish-brown.