Acrocephalus palustris - autumn

Marsh Warbler

AGE – BEST CRITERIA:


In 1cy, whole plumage is fresh, including whole wing and tail. Adult shows worn wing and tail. Colour of iris is supportive. 

1cy: 
  • Whole plumage (including wing and tail) is fresh. Signs of wear starts to show in tips of PP during mid or late autumn.
  • Colour of iris is rather cold greyish.
2cy+:
  • Whole plumage (including wing and tail) is worn, often notably so in GC, PC, TT, tips of PP and tail.
  • Colour of iris is warm brownish.

1cy August. LC, MC and GC are fresh (regardless wether juvenile or post-juvenile). [CP46848]

2cy+ July. Whole wing, including LC, MC, GC, and PC, is worn. [CP38833]

1cy August. Uniform and typically fresh juvenile RR. [CP46848]

2cy+ July. Note the typically worn pre-breeding tail of adult. [CP38833]

1cy August. The juvenile PC are typically fresh. [CP46848]

2cy+ July. The pre-breeding PC in adult birds are worn, with abrasion showing in tips and edges. [CP38833]

1cy Augusti, showing uniform and fresh juvenile TT. [CP46848]

2cy+ July. Adult birds show uniform and worn pre-breeing TT. [CP38833]

1cy August. Colour of iris is rather cold grey. [CP46848]

2cy+ August. Colour of iris is warm brown. [CP46782]

More Acrocephalus palustris:

Ageing spring
Moult
Identification

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