What that bird in Vietnam with yellow eyerings?
1/ northern hawk-cuckoo or rufous hawk-cuckoo (Hierococcyx hyperythrus)
2/ Hodgson's hawk-cuckoo (Hierococcyx nisicolor), also known as the whistling hawk-cuckoo
3/ lesser cuckoo (Cuculus poliocephalus)
4/ Himalayan cuckoo or Oriental cuckoo (Cuculus saturatus)
5/ cuckoo, common cuckoo, European cuckoo or Eurasian cuckoo (Cuculus canorus)
6/ Oriental cuckoo or Horsfield's cuckoo (Cuculus optatus)
