Chuck-will's-widow

Antrostomus carolinensis

The chuck-will's-widow is a nocturnal bird of the nightjar family Caprimulgidae. It is mostly found in the southeastern United States near swamps, rocky uplands, and pine woods. It migrates to the West Indies, Central America, and northwestern South America. Source

Where it is now

In the last 8 weeks this bird was recorded 429 times across 14 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 26°C (typically 26 to 28°C, from 12 areas). That holds across 15° of latitude, which suggests its timing follows temperature more than the calendar.

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.