Thanks for sharing this photo. I wanted to bring something new to this empid discussion: when differentiating between Dusky and Gray, note that Dusky Flycatcher will have a small, dark bill, but Gray Flycatcher has a much larger bill with an orange lower mandible. These two birds are remarkably similar in most other areas, and another mark that can be noted (but not used solely for differentiation due to typical variation) is that Dusky Flycatchers tend to have a rounded crown, whereas Gray Flycatchers tend to have a more flat-head appearance, which subtly alters each bird's GISS.
The birds are happy, and so am I
~Caleb Alons, Larimer County
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