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Alder or Willow Flycatcher? Lisle, IL (1 Viewer)


Flycatcher differentiation always stumps me! Opinions on this one? I'm torn between Alder or Willow (but could be wrong!)...

Seen on June 10 at Morton Arboretum in Lisle, IL.

Thanks all in advance!


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Well-known member
They cannot be distinguished visually (that is, if you can narrow it to these two “Trails” species first).
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