Gray Flycatcher also has light outer tail feathers. 

Chuck Hundertmark
Lafayette, CO

> On Apr 27, 2020, at 2:56 PM, David Tønnessen <davidtonness...@gmail.com> 
> wrote:
> 
> I agree with most everything Christian said. I have also witnessed birders 
> call empids Gray Flycatchers based on a downward tail flicking, but I think 
> the confusion is inexperience with empids and the lack of clarification when 
> this field mark is being taught. All empids flick their tails downward, only 
> Gray is special for dipping its tail BEFORE flicking it upwards. It can be a 
> hard judgement call since this is a fast movement and other species like 
> Dusky will flick upwards only slightly before a more significant and 
> noticeable downward movement. In further agreement, there are other marks 
> that should used to distinguish Gray as well; pale gray appearance, smooth 
> round/flat head shape, long thin bill with bright lower mandible, very faint 
> eye-ring. If you're not confident using a combination of these marks, leave 
> the flycatcher at empid sp.
> 
> 
> 
> David Tonnessen
> Colorado Springs
> 
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