Large scale movement patterns among song dialects in Brown-headed Cowbirds (Molothrus ater)v. 122American Ornithologists' Union803–818
Anderson, K. E., Rothstein, S. I., Fleischer, Robert C., and O'Loghlen, A. L. 2005. "Large scale movement patterns among song dialects in Brown-headed Cowbirds (Molothrus ater)." The Auk, 122 803–818.