Kimball et. al, 2013|
Coraciiformes, Trogon, Piciformes, Hornbill, Woodpecker
Eucavitaves is a clade that contain the order Leptosomatiformes (cuckoo roller) and the clade Cavitaves (a large assemblage of birds that includes woodpeckers, kingfishers and trogons). The name refers to the fact that the majority of them nest in cavities.
Cladogram of Eucavitaves relationships based on Jarvis, E.D. et al. (2014) with some clade names after Yury, T. et al. (2013).