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 ...

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 ...

Birds and humans perceive colors differently, so scientists rely on instruments and genetics to accurately describe the diversity of avian color signals. Aa Aa Aa Evolutionary processes have ...

Known as brood parasites, these birds that lay eggs in other birds’ nests employ a number of underhanded tactics. Some will rely on deception to trick other birds into raising their young.

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 ...

THE swallows and the cuckoos will soon be with us again. When we listen in a spiritual mood, these birds are emblematic of a ...