Red-eyed Vireo

Vireo olivaceus

The red-eyed vireo is a small American songbird. It is somewhat warbler-like but not closely related to the New World warblers (Parulidae). Common across its vast range, this species is not considered threatened by the IUCN. Source

Where it is now

In the last 8 weeks this bird was recorded 44,142 times across 45 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 21°C (typically 16 to 26°C, from 42 areas).

Over the weeks it was present in the past year, its centre in North America ranged from 42°N in May to 50°N in June, 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.