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INFO:
Cuckoos (family Cuculidae) are a diverse group of birds best known for their wide-ranging diets (often insects), distinctive calls, and—among many Old World lineages—brood parasitism (laying eggs in other birds’ nests). The family also includes non-parasitic forest cuckoos as well as more terrestrial forms like roadrunners and social anis.
Cuckoo Animal Facts - Cuculidae - A-Z Animals