Hi Birdforum folks,
I've been reading the current Harrier thread:
mostly for seeing how we contributers treat one another on the forum, but I noticed Jane Turner's (post#110) list of puzzling threads that had proven challenging at the time. Anyway, I decided to have a look at the photos. In short, I completely agree with Thayeri and others here, that the bird is a juvenile Ash-throated Flycatcher. The behavior, location, habits all fit. The peculiar tail pattern is quite typical for this species in juvenile plumage too. Overall, the structure is good for Ash-throated too, gray color in face and forehead too, etc.