Willow Flycatcher
Empidonax traillii
The willow flycatcher is a small insect-eating, migrant bird of the tyrant flycatcher family native to North America. Source
Where it is now
In the last 8 weeks this bird was recorded 1,507 times across 28 areas (each area is a 5 degree square).
See the Willow Flycatcher on the live map
Movement and weather
Each season it is first heard regularly where daytime highs are around 21°C (typically 15 to 24°C, from 15 areas).
Over the weeks it was present in the past year, its centre in North America ranged from 43°N in May to 51°N in August, 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.
| Region | First arrival | Last arrival | Typical peak | Areas |
|---|---|---|---|---|
| North America | 20 April 2026 | 22 June 2026 | 15 June 2026 | 15 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.