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Abstract Hawks, eagles, and their relatives (Accipitriformes: Accipitridae) are a diverse and charismatic clade of modern birds, with many members that are instantly recognized by the general public. However, surprisingly little is known about the relationships among genera within Accipitridae, and several studies have suggested that some genera (in particular, the megadiverse genus Accipiter) are not monophyletic. Here, we combine a large new dataset obtained from ultraconserved elements, generated from whole genome sequencing of 134 species, with publicly available legacy markers (i.e. a suite of commonly sequenced mitochondrial and nuclear genes) to infer a well-supported, time-calibrated phylogeny of 237 extant or recently extinct species. Our densely sampled phylogeny, which includes 90% of recognized species, confirms the non-monophyly of Accipiter and provides a sufficient basis to revise the genus-level taxonomy, such that all genera in Accipitridae represent monophyletic groups.