Definition
*Cuculus* is a genus of cuckoos, including the common cuckoo found in Europe and Asia. These birds are known for their distinctive calls and brood parasitic behavior. They lay their eggs in the nests of other birds, leaving the host parents to raise their young. *Cuculus* species are migratory, traveling long distances between breeding and wintering grounds. Think of them as the jet-setters of the bird world, always on the move. Their reproductive strategy and migratory habits make them fascinating subjects for ecological research.