Blue-headed Vireo

Vireo solitarius

The blue-headed vireo is a migratory songbird found in North and Central America. There are currently two recognized subspecies that belong to the blue-headed vireo. It has a range that extends across Canada and the eastern coast of the United States, Mexico, and some of Central America. It prefers large temperate forests with a mix of evergreen trees and deciduous under growth. Source

Where it is now

In the last 8 weeks this bird was recorded 25,400 times across 29 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 17°C (typically 12 to 23°C, from 24 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 44°N in May to 58°N in June, about 1,600 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.