Two sparrows which can sometimes be confused are the American Tree and Chipping. I managed to photograph them both recently in similar poses and I thought it might be interesting to compare them. The tree has a central breast spot, bi-colored bill, and the stripe through the eye is rusty like its cap. The chipping has no spot, a black bill, and a black eye stripe.
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. One caveat per Sandy's post of a few days ago and my experience with Chipping Sparrows...their beaks are not always black. Sibley hints indirectly that it may be breeding stage related, but I wouldn't bet the bank on that.

