Thryothorus ludovicianus
http://www.allaboutbirds.org/guide/carol...
This mentions that Bewick's wrens don't have rusty sides, and the bird in your picture does, so my vote is for Carolina wren. :)
Lat: 32.95, Long: -96.89
Spotted on Mar 23, 2011
Submitted on Mar 24, 2011