Supporting Information Figure S1 The relationship between mean intraspecific varia- tions (K2P) and the number of individuals analysed for each species. Black squares: cox1 (adjusted R2 = 0.001, P = 0.465). Grey dots: cob (adjusted R2 = 0.001, P = 0.338) Found at: doi:10.1371/journal.pone.0004119.s001 (0.41 MB TIF) Figure S2 Comparisons of K2P pairwise distances in (A) cox1, (B) cob, and (C) 16S genes in birds. Mean (6SD). K2P distances are compared within various level of taxonomic hierarchy for three genes. Found at: doi:10.1371/journal.pone.0004119.s002 (3.89 MB TIF) Table S1 K2P Mean intraspecific distances for cox1, cob, and 16S. Found at: doi:10.1371/journal.pone.0004119.s003 (1.23 MB DOC) Table S2 List of all samples that have been sequenced in this study, with voucher numbers and collection localities Found at: doi:10.1371/journal.pone.0004119.s004 (0.24 MB DOC) References 1. Brown WM, George M Jr, Wilson AC (1979) Rapid evolution of animal mitochondrial DNA. 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PLoS ONE | www.plosone.org 8 January 2009 | Volume 4 | Issue 1 | e4119