Willow Flycatcher

Willow Flycatcher Empidonax traillii

Abundance map: Post-breeding migration

Willow Flycatcher, Abundance map: Post-breeding migration
The Cornell Lab logo
Data provided by eBird

Willow Flycatcher

Empidonax traillii

Abundance: Post-breeding migration

This map depicts the seasonally-averaged estimated relative abundance, defined as the expected count on an eBird Traveling Count starting at the optimal time of day with the optimal search duration and distance that maximizes detection of that species in a region, averaged across the post-breeding migration season.  Learn more

Relative abundance
Post-breeding migratory season
Season date range
Jul 20 - Oct 19 Learn more