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Grey symbols refer to museum specimens, while black symbols refer to blood tissue collected in the field. Red symbols refer to the three dealbatus localities (all of which are museum specimens). Symbol shapes refer to different species (see Table S1 in File S1 for sample sizes): upfacing triangle – C. nivosus; diamond – C. marginatus; square – C. ruficapillus; downfacing triangle – C. peronii; circle – C. alexandrinus (incl. dealbatus).
