[Birdtalk] Re: Red Butte Warbler ID

[Steve Carr]

Besides the photos that have been seen, Carol, who photographed the bird, probably would have seen several flashes of the yellow rump as the bird flitted through the tree.  If she didn't report it, likely she didn't see any yellow in the rump.

--Steve Carr


  ----- Original Message ----- 
  From: Cliff and Lisa Weisse<mailto:CliffandLisa at octobersetters.com> 
  To: Birdtalk<mailto:birdtalk at utahbirds.org> 
  Sent: Friday, October 03, 2008 10:56 PM
  Subject: Re: [Birdtalk] Re: Red Butte Warbler ID


  The more I look at this one the more I feel it's likely a hybrid that 
  includes CSWA as one parent.  Regarding whether it's a Yellow-rumped the 
  pale spot on the back in photo #3 extends quite a way to the side of the 
  rump, doesn't contrast much with the rest of the upperparts, and 
  actually looks lime green rather than bright yellow, a better fit for 
  CSWA.  Other points against YRWA include extensively pale lower mandible 
  (I can't recall seeing a YRWA with a pale bill) and the shape of the 
  pale throat area which in my experience with YRWA is always triangular 
  and wider at the breast, not parallel edged as this bird shows.  Also 
  one of the tertial edges in photo #2 looks bright yellow.  YRWA can have 
  buffy tertial edges but not yellow.  Of course that's assuming the color 
  is as it appears in that photo which may not be correct. 

  I sent a note about this bird to a friend at the IBO research station at 
  Lucky Peak (Idaho) asking what he thinks.  I'll forward his reply if he 
  offers an opinion.

  Cliff

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