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Asian emerald cuckoo 
(Tìm vịt xanh, Chrysococcyx maculatus) 

The Asian emerald cuckoo (Chrysococcyx maculatus) is a species of cuckoo in the family Cuculidae. 
Bird is found in Bangladesh, Bhutan, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Sri Lanka, Thailand, and Vietnam.

The word Chrysococcyx combines the Ancient Greek khrusos meaning "gold" and kokkux "cuckoo".
The specific epithet maculatus is from Latin and means "spotted" or "blotched".

Chrysococcyx (formerly Chalcites) is a genus of cuckoo in the family Cuculidae. The word Chrysococcyx combines the Ancient Greek khrusos meaning "gold" and kokkux "cuckoo".

1/ Violet cuckoo (Tìm vịt tím, Chrysococcyx xanthorhynchus) 
2/ Asian emerald cuckoo (Tìm vịt xanh, Chrysococcyx maculatus) 
The specific epithet maculatus is from Latin and means "spotted" or "blotched".

Chrysococcyx (formerly Chalcites) is a genus of cuckoo in the family Cuculidae. 

Violet Cuckoo
(Tìm vịt tím, Chrysococcyx xanthorhynchus) 

The violet cuckoo (Chrysococcyx xanthorhynchus) is a species of cuckoo in the family Cuculidae.

The word Chrysococcyx combines the Ancient Greek khrusos meaning "gold" and kokkux "cuckoo".
xanthorhynchus
xanthos,-E,-on, yellow of various shades, golden or pale yellow; also red-yellow, chestnut, auburn.
rhynkhos New Latin from Greek meaning bill.