Red-rumped Swallow

Cecropis daurica

The eastern red-rumped swallow is a small passerine bird in the swallow family Hirundinidae. It is found in open, often hilly, areas with clearings and cultivation across eastern and southeastern Asia to north-eastern India and Taiwan. Source

Where it is now

In the last 8 weeks this bird was recorded 2,959 times across 21 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 28°C (typically 25 to 32°C, from 8 areas).

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.