Why do cuckoos hatch their eggs in other nests?

Cuckoos hatch their eggs in other nests as a reproductive strategy known as brood parasitism. By laying their eggs in the nests of other bird species, cuckoos can save energy and resources that would otherwise be spent on raising their young. This allows the cuckoo chicks to benefit from the care provided by the unsuspecting host parents, often at the expense of the host's own eggs or chicks. This strategy increases the cuckoo's reproductive success while minimizing parental investment.