Green-tailed Towhee

Pipilo chlorurus

The green-tailed towhee is a species of bird in the family Passerellidae, the New World sparrows. It is found in the western United States and much of Mexico. Source

Where it is now

In the last 8 weeks this bird was recorded 10,657 times across 18 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 22°C (typically 16 to 25°C, from 12 areas).

Over the weeks it was present in the past year, its centre in North America ranged from 34°N in September to 44°N in August, about 1,100 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.