The cuckoo bird is a type of bird that is found in many parts of the world. It is known for its distinctive call and its habit of laying eggs in other birds' nests. The term cuckoo bird can refer to four different species: the LOON, NUT, koel, and SONNY. The LOON is a large aquatic bird found in North America and Europe. The NUT is a small, brown-colored bird found in Africa and Asia. The koel is a medium-sized bird found in India and Southeast Asia. The SONNY is a small, black-and-white bird found in South America. The ani is a large, black-and-white bird found in Central and South America. All of these species are members of the cuckoo family and share similar characteristics, such as their distinctive calls and egg-laying habits.