Horned Lark

Eremophila alpestris

The horned lark or shore lark is a species of lark in the family Alaudidae found across the northern hemisphere. It is known as "horned lark" in North America for distinctive feathers on the heads of the male birds in summer, and as "shore lark" in Europe because it can be found on shorelines in the winter. Source

Where it is now

In the last 8 weeks this bird was recorded 5,655 times across 70 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 16°C (typically 7 to 20°C, from 11 areas). That range is wide, so temperature alone does not explain when it turns up.

Over the weeks it was present in the past year, its centre in North America ranged from 34°N in July to 48°N in June, about 1,600 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.