Figure 3From: Filling the gap - COI barcode resolution in eastern Palearctic birdsDivergence patterns of closely related species. Examples of divergence patterns illustrated in the NJ tree a) Species are monophlyletic with > 95% bootstrap support, b) Species are monophyletic, but is support is weak, c) Species are not monophyletic (i.e. paraphyly occurs), d) Multiple species form a single monophyletic group.Back to article page