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Now is the time in this part of Michigan you have to try to play "Where's the Brewer's?" in all the large mixed blackbird flocks.  Pretty sure this is a male and a female.  The male just has a different GISS than the Rusties and I've never seen one with that green sheen to it.  Not 100% sure the flight shot is the same bird.  The female has the dark eye, although that supercilium seems awfully strong.  

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All females are Rusties, and all the males almost certainly are too, though technically I don't think they're identifiable from the photos. It's still very early for Brewer's in the midwest.

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1 hour ago, Hasan said:

All females are Rusties, and all the males almost certainly are too, though technically I don't think they're identifiable from the photos. It's still very early for Brewer's in the midwest.

There have been Brewer's sighted from a month ago, and a week ago only 35 miles from this spot.  I'll give the male may not be definitive enough, but the female has dark eyes.  I thought that was a deal sealer for BRBL females to distinguish with RUBL.  I know the BRBL female can occasionally have pale eyes, but didn't think the reverse worked for RUBL.  

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1 minute ago, chipperatl said:

There have been Brewer's sighted from a month ago, and a week ago only 35 miles from this spot.  I'll give the male may not be definitive enough, but the female has dark eyes.  I thought that was a deal sealer for BRBL females to distinguish with RUBL.  I know the BRBL female can occasionally have pale eyes, but didn't think the reverse worked for RUBL.  

I won't weigh in on eye color as I don't have extensive knowledge of that off the top of my head.... But, all the females in this photo are rusty in coloration, and have a strong eyeline. It's classic Rusty, and completely incompatible with Brewer's. A common mistake when birding is to focus one particular field mark while ignoring the bird holistically. Also, FWIW, Brewer's are commonly mis-IDed in the east (and the reverse out west). Yes, Brewer's is possible, but Rusty outnumbers it 1000-1 and it's a tricky ID to make.

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