I found the following post about similar birds being seen:

http://www.birds.cornell.edu/crows/brown-headed%20chickadee.htm

Looks like this is more prevalent that I would have imagined.

Terry Brashear

Hennepin County, MN

http://www.naturepixels.com

birdnird AT yahoo.com

--- On Wed, 7/6/11, Larry Sirvio <lmsirvio@COMCAST.NET> wrote:

From: Larry Sirvio <lmsirvio@COMCAST.NET>
Subject: Re: [mou-net] "Boreal" chickadee photo on Recently Seen
To: MOU-NET@LISTS.UMN.EDU
Date: Wednesday, July 6, 2011, 9:24 AM

Rather than removing such an interesting pic why not just rename it?
I doubt many have seen a bird like this before.

Larry S

To: MOU-NET@LISTS.UMN.EDU
Subject: [mou-net] "Boreal" chickadee photo on Recently Seen

Before it is removed from Recently Seen, the photo of an aberrant Black-capped Chickadee is worthy of study. It is quite easy to see how a brief view of such an individual could result in it being incorrectly identified as a Boreal Chickadee. It's really a cool photo.

http://moumn.org/cgi-bin/recent.pl

Jim Mattsson
Eagan

----
Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net
Archives: http://lists.umn.edu/archives/mou-net.html

----
Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net
Archives: http://lists.umn.edu/archives/mou-net.html 
----
Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net
Archives: http://lists.umn.edu/archives/mou-net.html

----
Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net
Archives: http://lists.umn.edu/archives/mou-net.html