World Bird List

Species factsheet
Pacific-slope Flycatcher (Empidonax difficilis)

Order: Empidonax difficilis
Family: Tyrant Flycatchers, Calyptura (Tyrannidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
difficilis w Canada and w USA
insulicola Channel Is. (off California, USA)
cineritius Baja California (nw Mexico)
Annoncer