An MP3 file designed to aggravate music swapping users and help deter illegal copying. Cuckoo eggs are either erroneously named or edited. For example, a song with a heavy metal title is really ...

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?

Caption Cuckoo finch egg in zitting cisticola nest. Cuckoo finch eggs closely mimic the colour and pattern of the eggs of each of their several host species, to trick host parents into accepting ...

A lot of us will change our wardrobe to fit into a crowd, and the brood parasite known as the cuckoo has used evolution to do ...

This story appears in the January 2018 issue of National Geographic magazine. For the care and feeding of its offspring, the common cuckoo outsources. When she’s ready to lay an egg, a female ...

They mimic the look of the eggs of their hosts. In some birds, such as cuckoo finches, this egg coloration trait is passed from mothers to daughters: Female cuckoo finches mimic the eggs that ...

When a female cuckoo finds a suitable nest, and the hosts aren't looking, she removes one of their eggs and lays her own egg in its place. "The young cuckoo hatches after only 12 days and quickly ...

Bronze-cuckoo chicks, like the one on the right ... They looked at the practice of cuckoos laying their eggs in the nests of small songbirds. Some bronze-cuckoos had evolved to look more like ...