The chicks of the Cuckoo bird are apparently able to change their call, or voice, to mimic that of the bird's nest they're living in. This is because the mother Cuckoo bird lays her eggs in other bird's nests. When the baby Cuckoo birds hatch, they kick out the other baby chicks and mimic their calls. This way the mother will take care of the baby Cuckoo chicks.

New research shows that these Cuckoo birds can change their calls based on the nest of the host. This means it wouldn't matter what next the eggs are in, since the chicks can mimic multiple bird calls.

Females of the Horsfield's bronze-cuckoo (Chalcites basalis), usually lay their eggs in the nests of fairy-wrens, but will sometimes lay them in the nests of other species including thornbills and robins. Chicks that hatch in a fairy-wren nest are known to copy that species' short "cheep cheep" begging call, while chicks that hatch in the nests of thornbills imitate the thornbill's long, rasping whine.