Carpococcyx is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of large terrestrial

Terrestrial animal

Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...

 cuckoo

Cuckoo

The cuckoos are a family, Cuculidae, of near passerine birds. The order Cuculiformes, in addition to the cuckoos, also includes the turacos . Some zoologists and taxonomists have also included the unique Hoatzin in the Cuculiformes, but its taxonomy remains in dispute...

s in the Cuculidae family. They are restriced to humid forested regions in Southeast Asia

Southeast Asia

Southeast Asia, South-East Asia, South East Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies on the intersection of geological plates, with heavy seismic...

. Despite their similarities, they are not closely related to the South American ground cuckoos of the genus Neomorphus

Neomorphus

Neomorphus is a genus of terrestrial cuckoos in the Cuculidae family. Despite their relatively large size, they are highly inconspicuous and rarely seen...

.

Species

This genus contains three allopatric species; two of which until recently were considered conspecific under the name Sunda Ground Cuckoo:

• Coral-billed Ground Cuckoo (Carpococcyx renauldi)
• Bornean Ground Cuckoo (Carpococcyx radiceus)
• Sumatran Ground Cuckoo
  Sumatran Ground Cuckoo
  The Sumatran Ground Cuckoo is a large, about long, long-tailed terrestrial species of cuckoo. It has a green upperparts plumage with black crown, green bill and legs, bluish green bare orbital skin and brown below...
  
  (Carpococcyx viridis)