Sooty Grassquit

Asemospiza fuliginosa

The sooty grassquit is a small bird in the family Thraupidae, the tanagers and allies. It is found in Argentina, Brazil, Colombia, Guyana, Paraguay, Trinidad, Venezuela, and as a vagrant to Bolivia. Source

Where it is now

In the last 8 weeks this bird was recorded 6,473 times across 3 areas (each area is a 5 degree square).

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Movement and weather

Over the weeks it was present in the past year, its centre in South America ranged from 22°S in February to 11°S in April, about 1,200 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.