Cuculiformes

Great Spotted Cuckoo
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Cuculiformes
Families
Musophagidae
Cuculidae
Opisthocomidae
The near passerine bird order Cuculiformes traditionally included three families as below:

However, the taxonomy of this group is now controversial. Sibley-Ahlquist taxonomy raises the Musophagidae to an order Musophagiformes, and the Hoatzin continues to be enigmatic. Although the DNA evidence places it with the Cuculiformes, it has structural features inconsistent with that group.