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.

The genus name Cacomantis 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.
merulina, merulinus: Latin merulinus blackbird-like, thrush-like (> Latin merula blackbird).