Or the threshold to claim a family in the Passeriformes is just a lot lower...The comparatively late radiation of family-level clades of the songbirds (oscine Passeriformes) contrasts with the attenuated diversification of non-passeriform taxa since the early Miocene. This correlates with the evolution of vocal production learning, an important speciation factor, which is ancestral for songbirds and evolved convergent only in hummingbirds and parrots.
Or resurrect the Metaves for the last group?Cariama to passerine : Australaves
Higher landbird : Afroaves
Aquatic and semi-aquatic bird : Aequornithes and Eurypygimorphae
Grebes and flamingos : Mirandornithes
But, dove, gruiformes, shorebirds, cuckoo, hoazin : Columbaves ??