Traill's Flycatcher (Empidonax alnorum / traillii)

Taylor Creek Park, Toronto, ON.

May 9th, 2019. (2984)

Traill's flycatcher was a single species of flycatcher but is now considered to be two distinct species: Alder Flycatcher - Empidonax alnorum and Willow Flycatcher - Empidonax traillii. They are physically identical and can't be differentiated by a photo.