Phylogenetic analysis has shown that the grey-rumped swallow is most closely related to the white-backed swallow (Cheramoeca leucosterna) that is found in Australia.[2]
^Schield, D.R.; Brown, C.E.; Shakya, S.B.; Calabrese, G.M.; Safran, R.J.; Sheldon, F.H. (2024). "Phylogeny and historical biogeography of the swallow family (Hirundinidae) inferred from comparisons of thousands of UCE loci". Molecular Phylogenetics and Evolution: 108111. doi:10.1016/j.ympev.2024.108111.