Sylvia borin - spring

Garden Warbler / Trädgårdssångare

AGE - BEST CRITERIA:

Not possible to age due to complete pre-breeding moult in both age classes. A variation in wear (both between individuals and between feather groups in the same bird) is seen in spring, probably best explained by differentiated (or prolonged) periods of moult during winter.
2cy+ May. Whole wing is pre-breeding. [1ET29628]
2cy+ May. Whole tail is pre-breeding. [1ET29650]
2cy+ May, showing pre-breeding PC. [1ET29635]
2cy+ May. Uniform pre-breeding tertials. [1ET29650]
More Sylvia borin:
Ageing autumn

Moult
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