Hello again Tweetsters - I thought I would report in on the feedback I
got regarding identifying the Magnuson Park flycatcher shown in these
two pictures:

https://goo.gl/photos/HxsxRMavSripARCB6

Toshi Taniguchi originally posted these pictures and asked for help
identifying the bird. Toshi told me that he originally received
feedback from five persons who said Willow Flycatcher, two who said
Western Wood-Pewee, and one who said Olive-sided Flycatcher.

I heard from nine persons, seven of whom said Willow Flycatcher, one of
whom said Wood-Pewee, and one whose opinion I couldn't decipher.

So the clear consensus is Willow Flycatcher. Here is my summary of the
ID keys:

ID keys mentioned the most by most commenters as indicating Willow
Flycatcher:

1. Willows often don't have eye-rings but sometimes have a bit of an
eye-ring. The faint eye-ring in this picture is nothing like
Pacific-slope Flycatcher eye-ring and is consistent with Willow.
Wood-Pewees do not have eye-rings.
2. Pale, whitish chin (contrasted with dark face and dull olive to
brownish breast band below).
3. Rounded head (as opposed to the pointed head or crest of Wood-Pewee).
4. Substantial bill, thick, wide at the head.
5. Lower mandible is yellow-orange.

Characteristics mentioned by only one person (not necessarily the same
person) as indicating Willow:

1. Olive tones eliminate the Wood-Pewee.
2. Tail is somewhat wide throughout its length and squared at the tip.
3. White-fringed outer tail feathers.

ID keys that would be helpful, perhaps even definitive, for identifying
the bird but which were unknowns for this individual bird:

1. Song (FITZ-bew)
2. Tail-flicking? (Empidonax flycatchers flick tails.)
3. Primary projection. (Willow has short primary projection compared to
Wood-Pewee). Most commentators felt the branch in the photo prevented a
good view of the primary projection, but a few felt the fact they could
not see the primaries at all indicated they were short--and thus
indicated Willow and ruled out Wood-Pewee.
4. Perch: high or low?

Thanks to Toshi for posting these pictures and thanks to all who
responded and helped me improve my identification skills!

Jane Hadley
Seattle, WA