Perhaps the most famous nest hijacker in the bird world, the common cuckoo has even given rise to the phrase “cuckooing.” A female cuckoo carefully watches her host bird, usually small songbirds like ...

A George Mason University (GMU) biologist proposed an alternate theory of how the common cuckoo bird mimics other birds’ egg colorings at a biology department seminar Jan. 15. Hanley said cuckoos are ...

European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is inherited without leading to speciation. Bright blue, white, greenish, ...

A superb fairy-wren calls to a Horsfield's bronze-cuckoo. Brood parasites like cuckoos lay eggs in other birds' nests and leave them behind for the host birds to raise. David Ongley / Cornell Lab of ...