Vietnam Adventure Tours & Travel, Trekking, Bird Watching, Cycling Tours

Banded bay cuckoo or bay-banded cuckoo 
(Tìm vịt vằn, Cacomantis sonneratii)

The banded bay cuckoo or bay-banded cuckoo (Cacomantis sonneratii) is a species of small cuckoo found in the Indian subcontinent and Southeast Asia.

Cuculus: Latin for cuckoo.
The genus Cacomantis name is from the Greek kakos meaning evil or ill-boding and mantis for prophet. The name is associated with or supposed to be predicted "rains" as well as ill fortune and bad weather.

Cacomantis is a genus of cuckoo in the family Cuculidae. 

Plaintive cuckoo 
(Tìm vịt, Cacomantis merulinus)

The plaintive cuckoo (Cacomantis merulinus) is a species of bird belonging to the genus Cacomantis in the cuckoo family Cuculidae. It is native to Asia, from India, Nepal and China to Indonesia.