Cassin's Finch

Haemorhous cassinii

Cassin's finch is a bird in the finch family, Fringillidae. This species and the other "American rosefinches" are placed in the genus Haemorhous. Source

Where it is now

In the last 8 weeks this bird was recorded 22,239 times across 17 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 12°C (typically 10 to 25°C, from 13 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 39°N in February to 47°N in August, about 1,000 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.