Possible Eastern Wood-pewee (Boulder county: northeast Boulder)

[Bryan Guarente]

I had the good fortune of a wood-pewee showing up outside my office window this morning (3085 Center Green Drive, northeast Boulder).  Took some poor digibinned photos (in linked checklist below).

I found this bird to lean more towards Eastern than Western Wood-pewee.  Because this is an immature bird, I am hesitant of the colorations since it is a hatch-year bird. 

• Strong buffy wingbars of equivalent brightness to each other. 
  
• Long primaries compared to tail. 
  
• Coloration of back and head seemed more brownish (dirty) than grayish (rather than ashy). 
  
• Vested look is much more like Olive-sided Flycatcher than the washed out Western Wood-pewee I am used to. This individual showed a distinct open-vested look with an obvious white stripe down its chest. 
  
• When viewed from below, the undertail coverts seemed more yellowy, and less smudged than I have seen previously with Western Wood-pewee.
  
• Maxilla dark.
  
• Mostly yellow mandible (70-80%).
  
• Eyering.
  
• Crested look at times.
  
• No tail flicking.

Bird still present as of 11:10am.
Along the railroad tracks west of Center Green 2 (3085 Center Green Drive).

Here is my eBird checklist if anyone needs to see the photos.  

https://ebird.org/view/checklist/S48866030

Feel free to refute this claim as well as this would be a first for me in terms of differentiating.  Seen plenty of both species, just never found one in the "others territory".  

Bryan Guarente

Meteorologist/Instructional Designer

UCAR/The COMET Program

Boulder, CO