
Photo: M. Nishimura · CC BY-SA 3.0 (May be cropped or resized)
Cuculus optatus
The Oriental cuckoo, or Horsfield's cuckoo, is a cuckoo in the genus Cuculus. It was formerly classified as a subspecies of the Himalayan cuckoo, with the name Oriental cuckoo used for the combined species. differences in voice and size suggest it should be treated as separate. The binomial Cuculus horsfieldi has often been used for it (Wikipedia, general species account). The Oriental cuckoo or Horsfield's cuckoo (Cuculus optatus) is a bird belonging to the genus Cuculus in the cuckoo family Cuculidae. (Wikipedia, general species account).
Adult females and juveniles occur in two morphs. Notable features include a large breeding range in northern Eurasia. The exact extent of its wintering range is uncertain due to its secretive habits and the difficulty of separating it from the Himalayan cuckoo and other similar species. It mainly inhabits forests, recorded in coniferous, deciduous and mixed forest. Within a few days it pushes the eggs or young of the host out of the nest. (Wikipedia, general species account).