Icterine Warbler

Hippolais icterina

The icterine warbler is an Old World warbler in the tree warbler genus Hippolais. It breeds in mainland Europe except the southwest, where it is replaced by its western counterpart, the melodious warbler. It is migratory, wintering in sub-Saharan Africa. Source

Where it is now

In the last 8 weeks this bird was recorded 99 times across 5 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 17°C (typically 15 to 21°C, from 17 areas). That holds across 25° of latitude, which suggests its timing follows temperature more than the calendar.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.