Hierococcyx or hawk-cuckoos is a genus of birds in the family Cuculidae. The resemblance to hawks gives this group the generic name of hawk-cuckoos.
The genus is sometimes included in the genus Cuculus.

1/ Large hawk-cuckoo (Chèo chẹo lớn, Hierococcyx sparverioides)
previously assigned as Cuculus sparverioides
2/ Malaysian hawk-cuckoo or Malay hawk-cuckoo (Bìm bịp nhỏ, Hierococcyx fugax)
previously assigned as Cuculus fugax

3/ Hodgson's hawk-cuckoo (Hierococcyx nisicolor, Chèo chẹo Hodgson)
also known as the whistling hawk-cuckoo

Cuculiformes, cuculidae: Latin cuculus cuckoo.
Hierococcyx Greek hierax hawk and kokkux cuckoo.