Brewster's Warbler - a photo on Flickriver

Brewster's Warbler

            Been away from Flickr for several weeks and looking forward to catching up. 
From my recent Michigan trip. Check out Mike Diersing's photostream for more images from the trip!

This beautiful hybrid is a second generation back-cross Brewster's as it has no yellow whatsoever in the throat or chest and has a 'clean' gray appearance to its back. 1st generation Brewster's have some yellow as forementioned and look dirtier on the back with some olive there. Most of the hybrids in this population of G0lden-wingeds have been second generation back-crosses over the 6 years (7 years total) I've visited this location. I've averaged 0-2 Blue-w1ngeds each visit, 1-4 Brewster's, and a few dozen G0lden-wingeds to give an idea of the relevant population mix. A few years ago I had a female Lawrence's as well. So far there has been no noticeable change in that population mix over 7 years. Dates for Michigan 2022 will be announced soon. 

For those interested here follows a few more words about 1st and 2nd generation Brewster's. First generation as described above are the result of a Blue-W1nged and G0lden-w1nged mating. 2nd generation back-crosses (pictured above) are generally the result of a 1st generation Brewster's mating with a G0lden-w1nged. Brewster's being rare themselves are 10 times more common than Lawrence's hybrids. The later normally is found more commonly once much of the original G0lden-w1nged population has been replaced. However with a good number of 2nd generation Brewster's in this population there is always a chance for a Lawrences's hybrid and odds are eventually I will locate a male in the population.

Taken on: May 22, 2021

Tags:

Brewster's Warbler

Michigan

WarblerWhisperer.com

Sets appears in: • Michigan • Warblers and Yellow Flowers more » • explore • hybrid warblers « less

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Camera: Canon EOS 5D Mark IV, f/5.6, 1/1600 sec, 600mm, ISO 320 (more info) (hide info)

Camera:	Canon EOS 5D Mark IV
Lens:	EF600mm f/4L IS USM
Aperture:	f/5.6
Exposure Time:	0.001 sec (1/1600)
Focal Length:	600mm
ISO:	320
Exposure Bias:	-2/3 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Partial
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 8.4 (Macintosh)
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