Lapland Longspur

Calcarius lapponicus

The Lapland longspur, also known as the Lapland bunting, is a passerine bird in the longspur family Calcariidae. It is a circumpolar arctic breeder and the only member of the genus Calcarius present in Eurasia. Source

Where it is now

In the last 8 weeks this bird was recorded 5,552 times across 64 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 18°C (typically 17 to 21°C, from 11 areas). That holds across 30° 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 North America ranged from 43°N in December to 56°N in August, about 1,400 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.