Figure 1From: Single mitochondrial gene barcodes reliably identify sister-species in diverse clades of birdsExamples of DNA barcodes distinguishing sister species. Neighbor-joining tree constructed with K2P genetic distances. Fixed substitutions are represented by coloured boxes, with corresponding character positions relative to the beginning of COI. a) Phalaropes (Phalaropus); b) Penguins (Aptenodytes); c) Goldeneyes (Bucephala).Back to article page