The term comes from the cuckoo bird, which lays its eggs in the nests of other birds. See Easter Egg. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

When the cuckoo chick hatches, it ejects other eggs or hatchlings to get all the ... who’s an avid wildlife photographer, observed the birds’ behavior in 2014 in Amsterdam, where she lives.

and the brood parasite known as the cuckoo has used evolution to do the same thing. Because cuckoos lay their eggs in the nest of a host bird, the nestlings need to develop similar attributes to ...

2010). These and other cuckoo hosts appear to have evolved a simple rule of thumb to direct their behavior: "eject the egg unlike your own". But how does a bird know what its own eggs look like?

SPOILER ALERT: This article contains minor spoilers for "Cuckoo," now playing in theaters. Roughly 40% of cuckoo bird species are "brood parasites." Instead of building its own nest, the cuckoo ...

The yellow-billed cuckoo is sometimes called the "rain crow" because its song is often heard just before thunderstorms or summer showers. But this rare bird raises its voice less and less often in ...

These birds are closely related to the Old-World cuckoos that gave rise to the sound that comes from a Cuckoo Clock. The Old-World cuckoos are well known for laying their eggs in other bird’s ...

Generally shy and elusive, the yellow-billed cuckoo can be easily overlooked. Its calls are usually loud and often provide the best evidence to the presence of the bird. It favors eating ...

The yellow-billed cuckoo is sometimes called the "rain crow" because its song is often heard just before thunderstorms or summer showers. But this rare bird raises its voice less and less often in ...