Thogmartin, W. E., Howe, F. P., James, F. C., Johnson, D. H., Reed, E. T., Sauer, J. R., and Thompson, F. R., 2006, A review of the population estimation approach of the North American Landbird Conservation Plan: Auk, v. 123, no. 3, p. 892-904. Keywords: Breeding Bird Survey, Cerulean warblers, point counts, abundance, roads