Eurasian Reed Warbler

Acrocephalus scirpaceus

The common reed warbler or Eurasian reed-warbler is an Old World warbler in the genus Acrocephalus. It breeds across Europe into the temperate western Palaearctic where it is migratory, wintering in sub-Saharan Africa. It is also a resident species over large parts of Africa. Source

Where it is now

In the last 8 weeks this bird was recorded 569 times across 22 areas (each area is a 5 degree square).

See the Eurasian Reed Warbler on the live map

Movement and weather

Each season it is first heard regularly where daytime highs are around 14°C (typically 12 to 15°C, from 13 areas). That holds across 20° of latitude, which suggests its timing follows temperature more than the calendar.

Over the weeks it was present in the past year, its centre in Europe ranged from 50°N in May to 59°N in July, about 1,000 km apart.

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.

Download every area as CSV

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