Fig. 4From: Species-level divergences in multiple functional traits between the two endemic subspecies of Blue Chaffinches Fringilla teydea in Canary IslandsA median-joining haplotype network of the 655 bp COI sequences (i.e., the barcode marker) of ssp. teydea (blue, N = 161) and ssp. polatzeki (red, N = 14) of the Blue Chaffinch Fringilla teydea, and the sister species Common Chaffinch Fringilla coelebs (yellow, N = 1). Numbers indicate mutation steps between haplotypes (single mutation steps not indicated). Specimen information and their respective GenBank accession numbers are available In Additional file 1 Back to article page