Common Grasshopper Warbler
AGE – BEST CRITERIA:
1cy October. Whole wing uniform and fresh. [CS00088]
2cy+ September. Wing is typically worn (note esp. the freyed and bleached tips to PP). This individual has conducted a rather extensive partial post-breeding moult, including GC1-9 and some TT. [CP47768]
1cy September. Fresh and uniform juvenile GC. [CP39925]
2cy+ September. Adults often show a uniformly worn pre-breeding wing, but birds with a more extensive post-breeding moult (like this one, with 4 central GC freshly moulted) are not uncommon. [CP40283]
1cy October. Juvenile PC are fresh with dark centra and olive edges. [CS00088]
2cy+ September. Adult PC are worn with faded brown centra and freyed olive-buffish edges. Note also the worn AL. [CP40283]
1cy October. Juvenile TT are fresh with dark centra and olive edges. [CS00088]
2cy+ September. The two longest TT are post-breeding, contrasting to the shortest T, the SS and innermost GC which are all from the pre-breeding moult. Adult birds may include 0-3 TT in the post-breeding moult. [CP47768]
1cy September. Whole tail is uniform and fresh. [CP47831]
1cy October, showing variation in tail pattern. [CS00088]
2cy+ September. Adult showing typical wear in the pre-breeding tail. Note that the right R6 (partly covered by the broken R5) is fresh post-breeding. [CP47768]
2cy+ September, showing completly moulted post-breeding tail, apart from R4-5 i left half, which were recently shed. Single moulted RR are often seen in adult (like in the bird to the left), but a more advanced post-breeding moult, like in this bird, is not common. [CP40283]
1cy September. Typically juvenile iris being cold olive-grey. [CS04376]
2cy+ September. Adult iris is slightly warmer greyish-brown (although there is usually no need to examine iris during autumn in this easily aged species). [CP40283]
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