Oriental cuckoo 
or Horsfields cuckoo 
(Cu cu phương đông, Cuculus optatus), formerly classified as a subspecies of the Himalayan cuckoo (Cuculus saturatus)

The Oriental cuckoo or Horsfields cuckoo (Cuculus optatus) is a bird belonging to the genus Cuculus in the cuckoo family Cuculidae.

The genus name Cuculus is the Latin word for "cuckoo".
optata, optatus Latin optatus welcome, wished for (optare to choose, to desire).