Cacomantis is a genus of cuckoo in the Cuculidae family. The genus name is derived from the Greek kakos meaning evil or ill-boding and mantis for prophet and is derived from their association with "rains" being supposed to be predict ill fortune and bad weather. Most of them have a round nostril and are mainly in brown and gray colours. The tails are graduated and barred. The bars are transverse in sonneratii and oblique in all others. It contains the following species: