Chestnut-winged cuckoo 
or red-winged crested cuckoo (Khát nước, Clamator coromandus)
The chestnut-winged cuckoo or red-winged crested cuckoo (Clamator coromandus) is a cuckoo found in Southeast Asia and parts of South Asia.
The species is found from the western Himalayas to the eastern Himalayas and extends into Southeast Asia. It has been recorded from India, Nepal, China, Indonesia, Laos, Bhutan, Bangladesh, Cambodia, Thailand, Myanmar, Malaysia, Vietnam, Sri Lanka and the Philippines.

The name Clamator is Latin for "shouter" from clamare, "to shout".