The common cuckoo (Cuculus canorus) is a migratory bird found across Europe and parts of Asia. It is known for its distinctive call, which sounds like "cu-coo," and its grayish-brown plumage with a lighter underside. The cuckoo typically arrives in Europe during spring and departs for Africa in the fall. One of the most interesting behaviors of the common cuckoo is its brood parasitism. Instead of building its own nest, the female lays her eggs in the nests of other bird species, often tricking them into raising her young. This strategy helps the cuckoo conserve energy and resources for its own survival.