The violet cuckoo (Chrysococcyx xanthorhynchus) is a species of cuckoo in the Cuculidae family. It is found in Australia, Indonesia, Papua New Guinea, and the Solomon Islands. The violet cuckoo is a medium-sized bird, with a length of 2530 cm. It has a blue-black head and upperparts, and white underparts. The tail is long and graduated, and the wings are short and rounded. The violet cuckoo is a brood parasite, meaning that it lays its eggs in the nests of other birds. The most common host bird for the violet cuckoo is the fantail cuckoo (Cacomantis flabelliformis).
The violet cuckoo is an important part of the Australian ecosystem. It helps to control the populations of fantail cuckoos, which can become pests in agricultural areas. The violet cuckoo is also a popular bird with birdwatchers, due to its striking appearance and interesting behavior.