1) Animal order 2) Cuckoos 3) Order cuculiformes 
The near passerine bird order Cuculiformes traditionally included three families as below: However, the taxonomy of this group is now controversial. The Sibley-Ahlquist taxonomy raises the Musophagidae to an order Musophagiformes which may or may not be warranted. The Hoatzin continues to be enigmatic; it is probably best regarded as a distinct, m...
The Cuculiformes are an order of birds comprising the cuckoo and turaco families.
[n] - cuckoos
order Cuculiformes noun cuckoos; touracos; etc.