errant. These were placed in their respective position more for lack of better evidence than anything else. The phylogenetic layout of the accipitrids was historically a matter of dispute. Molecular studies have removed the phylogenetic uncertainty for most of the species. The accipitrids are recognizable by a peculiar rearrangement of their chromosomes. Apart from this, morphology and mtDNA cytochrome b sequence data give a confusing picture of these birds' inter-relationships. The hawks, kites, eagles and Old World vultures as presently assigned in all likelihood do not form monophyletic groups. The genus level cladogram of the Accipiridae shown below is based on a densely sampled molecular phylogenetic study of the Accipitridae by Therese Catanach and collaborators that was publi