Relationships between three main Yellow-headed Amazona lineages and their support values obtained for different methods and analysed data sets.

1based on Ribas et al. [14] data set;2based on Ribas et al. [14] and modified data set;3based on Rusello and Amato [7] and modified data set;4similar to the set3 but including also cytochrome b;*the clade contains also A. arausiaca and A. versicolor; LR-ELW - Local Rearrangements–Expected Likelihood Weights method; boot – bootstrap method; aLRT - the approximate likelihood ratio test based on a Shimodaira-Hasegawa-like procedure.C –Central American lineage, S – South American lineage, NS – Northern South American lineage including A. barbadensis and its relative A. ochrocephala ochrocephala.