The species in taxonomic order are:
The genera Saurothera (the lizard cuckoos) and Hyetornis (chestnut-bellied and bay-breasted cuckoos) were lumped with Coccyzus by the American Ornithologists' Union in 2006.

On the other hand, the ash-colored cuckoo and dwarf cuckoo – at one time separated in Micrococcyx – have been found to be closest relatives of the little cuckoo, formerly in Piaya.
These three are now again placed in the reinstated genus of the latter, Coccycua.
The species in taxonomic order are:
The genera Saurothera (the lizard cuckoos) and Hyetornis (chestnut-bellied and bay-breasted cuckoos) were lumped with Coccyzus by the American Ornithologists' Union in 2006.
On the other hand, the ash-colored cuckoo and dwarf cuckoo – at one time separated in Micrococcyx – have been found to be closest relatives of the little cuckoo, formerly in Piaya. These three are now again placed in the reinstated genus of the latter, Coccycua.
Coccyzus