Collared Flycatcher

Ficedula albicollis

The collared flycatcher is a small passerine bird in the Old World flycatcher family, one of the four species of Western Palearctic black-and-white flycatchers. It breeds in southeast Europe and Eastern France to the Balkan Peninsula and Ukraine and is migratory, wintering in Sub-Saharan Africa. It is a rare vagrant in western Europe. Source

Where it is now

In the last 8 weeks this bird was recorded 39 times across 10 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 14°C (typically 11 to 16°C, from 8 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 38°N in March to 57°N in June, about 2,100 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.

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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.