Bucerotiformes adalah ordo burung yang terdiri dari burung rangkong, rangkong tanah, hudhud dan hudhud kayu.[1] Ordo burung ini sebelumnya diklasifikasikan sebagai anggota Coraciiformes.[2][3][4] Klad ini tersebar di Afrika, Asia, Eropa, dan Melanesia.
- ^ Gill, Frank; Donsker, David, ed. (2019). "Mousebirds, Cuckoo Roller, trogons, hoopoes, hornbills". World Bird List Version 9.2. International Ornithologists' Union. Diakses tanggal 23 July 2019.
- ^ Johansson, Ulf S.; Ericson, Per G.P. (2003). "Molecular support for a sister group relationship between Pici and Galbulae (Piciformes sensu Wetmore 1960)" (PDF). J. Avian Biol. 34 (2): 185–197. doi:10.1034/j.1600-048X.2003.03103.x. Diakses tanggal 2008-10-30.
- ^ Yuri, T. et al. (2013) Parsimony and Model-Based Analyses of Indels in Avian Nuclear Genes Reveal Congruent and Incongruent Phylogenetic Signals. Biology, 2(1):419-444. doi:10.3390/biology2010419
- ^ Jarvis, E.D. et al. (2014) Whole-genome analyses resolve early branches in the tree of life of modern birds. Science, 346(6215):1320-1331.