Occurrence
The European population is estimated at around 460,000 pairs. It has declined in some areas, particularly at the western end of its breeding range in Denmark (where it is now extinct as a breeding bird) and Germany, due to habitat loss from agricultural intensification; conversely, some increase has occurred in Ukraine and southern Finland. Further east, numbers are currently stable. Population densities range between 1–20 pairs per 10 ha in Germany, up to 30 pairs per 10 ha recorded in Kazakhstan.
Barred Warblers are regular on autumn passage as far west as Great Britain (typically 100-200 records annually), where it occurs mainly on the east coast between late August and late October, and more rarely to Ireland (around 10–20 records annually); spring passage records in Britain are very rare (1–3 per decade). The vast majority of British and Irish records are of first-year birds, with adults occurring only exceptionally rarely.
Read more about this topic: Barred Warbler
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