Bushtit

Psaltriparus minimus

The American bushtit, or simply bushtit, is a social songbird belonging to the monotypic genus Psaltriparus. It is one of the smallest passerines in North America and it is the only species in the family Aegithalidae found in the Americas; the other eleven species occur in Eurasia. Source

Where it is now

In the last 8 weeks this bird was recorded 1,642,220 times across 24 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 34°C (typically 24 to 38°C, from 7 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 30°N in September to 38°N in April, about 900 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.