The size of each oval is proportional to the frequency of the haplotype in the analysis. White dots represent mutational steps separating the observed haplotypes. Different shades represent the proportion of individuals of each subspecies exhibiting that particular haplotype (colors as in Figure 1).Copyright information:Taken from "Genetic evidence links invasive monk parakeet populations in the United States to the international pet trade"http://www.biomedcentral.com/1471-2148/8/217BMC Evolutionary Biology 2008;8():217-217.Published online 24 Jul 2008PMCID:PMC2517076.